Hobbsy and do335a that is indeed what they look like. They are 0.2 thick, 1.8mm wide and 12mm long. There are suppossed to be 2 per apex seal. It would be nice if Tower had them by mid December but I suspect that is not real - I guess I can ask them to email me.
I only know of one guy running one in this part of the world. I believe he was quite successful with it. I have read plenty of accounts of bad experiences too. There was a sugggestion that tolerances from new were a bit variable and so some ran well and others not at all. Wear was a common problem leading to no compression. Also cooling was critical along with oil to try to prevent the springs losing their temper.
If I can make this one run a few time on the bench and maybe fly it a few times then put it on display I would be happy. I repair and re-build a few old glow, diesels and spark engines for fun to then put on display. I fully accept getting the wankel running may be an exercise in futility.
Thanks
Tarquin