RE: DLE 30 ignition voltage
Not too surprised at that. What many have noticed is that they can't get that burble out no matter how well it's tuned. At that point, opening the gap up with no other changes will usually make enough difference where the problem is no longer noticeable?
Starting out with a wide gap allows more forgiving settings, allows you to stay on the rich side of things? It doesn't force you into leaner conditions where you may find dead stick landings start occurring.
BTW, this tip is not just for the DLE 20 people. It works very well on most all of the smaller gassers, including the 30 and 35cc engines. -Al