Hi. Just read the forum again.

Re. preferred ignition unit: I use the CH Ignition unit (aluminum case) and the RCExl by CH Ignition w/o problems. I also recommend the units sold by RC Extreme Power, (Milton Thompson). These are excellent as well (suspect they are RCExl too.). You can find both on the Web, and here @ RCU.

Re. the comment about using muffler pressure w/gas: I have to say that while it worked, if the tubing ever fails and raw gas hits the hot muffler... well I hope you have a fire extinguisher handy. You'll need it.

Re. the comment about less oil in the FAI fuel: Yes, you can run straight FAI, or a less oil mix (approx. 12%). I recommend that you run a synthetic oil FAI fuel, no castor. A great synthetic is Klotz Techniplate.

I hope this helps, and good luck with the engine.

Ken (Starfighter)