Thanks Bill,
I have ot been on the MECOA site for a while. The last time I was there, the Cox conversion heads were all of the type taking standard glowpluugs. That is a definite no for me, because of the very poor performance of the heads due to low compression.
Thinkong about it, the 0.9 is likely to suffer least from that problem, so it may be worth a try, I must have a look at the site, you never know, they may have the Nelson/turbo plug heads by now.
Thanks,
Andrew.