Pure Music :-)
After install you make some testruns in the cowling. is everything sounds good.... fly it. if possible, i lift the plane up on full throttle, to take care that H is not to lean and the engine will not die.
but most time on the first flights you will find out that H is to rich. the engine sounds good on ground (about 5000rpm) but is too rich at 6000+. so you will Need 3-4 flight to set it up perfect.
to see if all Zylinders are adjustet the same, check the dirt in the exhaustpipes with you fingers and compare.
My friend Simon wrote a very good description. maybe he will post it here later.
Tom