Thank you Av8tor for quick reply! I'll go that route.

The following questions are not connected to the previous one but I would be grateful for a reply:

I wonder if these conversion engines are particularly hard to tune. How reliable are they?Will they dead stick easily? (i.e. more easily than a nitro engine?) Are they less reliable than gas? I've got no experience with gas engines either so Iam wondering if Ibit off more than I can chew here.

Is a homelite 25 a decent choice for a 120 size airplane ( I'm going to fit this on a CMP 72 inch zero which seems to do well on a 26 size gas engine).

Ranga