Thanks for that info Paul.
I was in the shed yesterday and was going to fit plastic seats but the seating position in MUCH higher.
So I've decided to go with a timber seat, after laying a couple of bits of chip board on the chassis, it felt a much better position.
Why reinvent the wheel eh!!!!
I've never tried anything in fiberglass (other than a cowl for a model plane that looked like a dog chucked up) so plywood it is.
I must compliment you on the plans for the mini. A lot of hours have gone into drawing them. They are
first class and very easy to follow.

We are enjoying the build.
Many thanks, Chook