I had a whole quiver of microfreaks for my kids a long while back and they are great. Not sure why I would get a 4.8 microfreak instead of just getting a superfreak, I guess is you had a real short wide kid maybe

I love my old style maui edition super freaks (full dacron no xply) so I expect you would like the kids version if you can get it. I know some foilers use kids sails as they want the real small sizes. But if I was going over 3.5 I would just go with the adult superfreaksas the mast cutout will be normally placed

I'm about 6' and use the Pryde DragonFlys kids rigs in 2.5 & 3.5. Boom cutout isn't an issue, I add a little extra mast extension to get the boom a bit higher - still fits nicely in the cutout and I figure if I'm on the 2.5 I'm kidding myself to think I'm losing noticeable efficiency, way too much else going on.
Only concern will be long term durability, at my 90kg in big winds some of the wipeouts can be spectacular - interesting to see how they hold up over time. For now loving the super light materials and overall feel.
I think there a few brands making what I'd call "junior" wave sails (as opposed to kids rigs) that are a great option for foiling.

miamiwindsurfe said..
Got to use 2.8m2 microfreak hsm, I'm very impressed coming from severne foil freak and goya cyphers,fringe. More wind range, boom low and the power is super soft. I should have switched 3-4 years ago...

Testing in Cabarete, winds up to 30 knot, all worked out really well, 2.8 and 3.8 micro freak combo, mainly 2.8 but had 1.5 lighter day with 3.8. Love the simplicity of one mast(310) 2 sails solution for all conditions, and all much easier, softer.