cald said..
Looking at sailing lake weyba mostly plus some golden beach and cootharaba. I'm about 92kg and only interested in windsurfing in proper wind - i.e over 20kts - hate to say it but up till then i would rather kite...

For the part time sailor, those winds are hard to find on a consistent basis. You may have to travel down to the Moreton Bay spots or Gold Coast depending upon the day. As you say, kites have their appeal in light conditions. Foiling may be another option though. It is good to be prepared for all conditions if you can afford the gear.

Keep an eye on the Seabreeze buy and sell forums, heaps of stuff available but be quick. I did the same in September, even equipment that is up to 10 years old is a quantum leap compared to 20 years ago.

the next couple of days are looking to be exactly what you are talking about condition wise..

Lake Weyba is fun and safe, but is gusty so you need a bit of extra volume and size to what you were mentioning to allow for the lulls of which there will be plenty between the gusts, and in between the squalls you can get rain outs , which means a long slog back to land with no wind ...so bigger board..its pretty flat there so bigger boards are easy as.

you actually want more than 90ltr especially your size, for lake weyba - think 100-110ltr 65-72cm wide board, 7m sail, is a super common size up there...you might want to go a little smaller until you get your skill set back,

I set someone up similar to you just recently , the recipe was

Starboard Carve 72cm wide, Ezzy Cheetah sails 6.5 and 7.5 2 fin sizes to increase your range....if you had to pick one size sail only go 7m that will cover you from 15+ knots to high 20's ( a typical 20+knt day at lake weyba is 16-28knts! so you need range!)

you don't want a slalom board....or slalom sails.

look for Starboard: Atom's, Carves, Large size Kodes, Futuras
Fanatic: Gecko, Hawk, Blast
JP: Magic Ride, All Ride,
Tabou: Rockets, Bullits,

few others that fit the bill also but just avoid race stuff and going 'too small'

As already stated, it is quite normal for a high-wind slalom to be your bodyweight + 10 litres vs light wind would be your weight + 40 litres -> modern boards+sails are fast, you dont need small to be fast (you will actually go slower).

At 92kg you will probably looking at around 100 - 110 litres... which is based on 92kg + roughly 10-15kg for a 7m slalom rig. A 90L board would be more like a speed board (for your weight).

... and generally - again as mentioned - you dont want race gear - fast-freeride is what most people are happy with. [ Edit ] They are hard to rig correctly, they are not-forgiving to use, they dont waterstart easily, they are heavy (by comparison to other gear).... noting that "race gear" and "slalom gear" are different.

Contact Simon at Board crazy, see if he still has my RRD Firestorm 112, it's at the high performance FR side, loves a 7m , forgot to mention RRD brand boards !

Cald, I jumped back in last year, confined myself to used gear and immediately struggled with getting masts to match my sails.
This is may be specific to my region, but the lesson I learned was the order of decision making should be:
1. Determine the sail sizes you need - see above.
2. Limit yourself to sail brands which rig on a constant curve mast. This bend curve will give you the most sail brand choice flexibility. Check out Unifiber's mast selector pages.
3. Assemble your sails.
4. Next, get masts of the right bend curve, length and stiffness for your sails. If you are lucky, you can avoid getting a separate mast for every sail. For example, my 7.0 and 5.8 both rig on the same 430 cm mast.
5. It can get very expensive to ship long masts, so you can spend/lose a lot of time trying to save $ on trying to find a mast which is correct and local and reasonably priced. Sometimes you just have to pay up to avoid spending months searching for a bargain.6. RDM v SDM. Go RDM for sails 7.0 and below, but be prepared to go with SDM if you decide to get a larger sizes like 8-8.5. Sailworks and Duotone recommend SDM for their larger sizes, especially for heavier riders. Other brands differ. 7. Start with tall mast extensions. Gives you greatest sail size coverage.
The more experienced folks probably can explain how all the above is b.s. or not applicable to your situation, but that is the lesson I've learned from the last 12 months.
Good luck

Half and half. I'm learning to waterstart and gybe for the first time. But the equipment is so much better and I'm super stoked. There's a long learning curve - judging wind speed/sail size choice, do you rig for the gust or the lulls?, which skills to prioritize (harness, planning, straps, gybes, ...), gear choices, etc
I've had several early wasted sessions where I either didn't own the right size sail, or I choose the wrong one.
Greatest part is discovering the community of like-minded, nice, generous people who are willing to share their knowledge and the good vibes.