Issue is that for some who don't/won't set their DLE20 idle to 1700-1800 rpm, instead setting it higher around 2000-2300 rpm.
THe DLE20 #4 ign module kicks in it's advance all at once around 2200-2400 rpm and it surges up several hundred rpm.

NOT an issue to the vast majority of us! Just properly tune the LS/HS needles, set the idle correctly, and go fly the daylights out your DLE20!

I have 2 of them and not a bit of difficulty from either one.