[8D] Can anyone help please?

I need a light weight high performance 25 to 32 glow engine for a Hawk trainer (RAF type). Have tried an ASP28, but its rather heavy mainly due to a large silencer, requiring 60g of lead in the tail - bad news.

Looked at the OS32SX and 25FX (32 has nearly 50% more power!), but would prefer a front mounted needle valve to fit cowling. A little hesitant about SC and Magnum

Any suggestions?

Regards,