
I tried putting my DIY heater element into the exhaust which worked well, apart from melting the plastic.

Have a look http://www.rctankwarfare.co.uk/forums/v ... f=1&t=8045" onclick="window.open(this.href);return false;
Smoke still escapes and comes out of the shield like you mentioned. I take it you've piped right up to the exhaust outlet at the top, how did you get round the top mounted screw?