Thanks Spaceworm.
I started the engine after dark tonight with a light to see what we doing. I was showing a buddy who has been very helpful along the way with the conversion.
We noticed that at low RPM, there was a noticeable amount of fuel visibly spraying out of the carburettor and into the propwash.
It seems like a velocity stack would be of some advantage to reduce this.
I have no experience of working out the length of such a tube. We were wondering if 50 mm would suit this engine.
Anyone able to offer some recommendations about this?