Was wondering what is best way to go:
Make some wood ones or buy some plastic ones?
If plastic ones, which ones are best?
Do plastic ones sink into grass pitch more then wood ones?
Maybe a piece of plywood to put under plastic ones?..
If stacking wood or wood and plastic ones, is there a problem with them sliding out as you try to drive up on them?
Use jack and blocks to level out? (what I've been doing)
So many questions.

I have some 3x3" treated wood, some 6x2", some BWP plywood scraps too. so could make something with them... Just need to figure out what I want to make... or just get some plastic ones.
Thanks