Working with N scale, for years it was tough finding (much less installing!) a sound decoder that was small enough to fit in any loco and leave enough room for a speaker w/baffle without milling all the weight out. Still not as easy as the Kato boards, but I'll gratefully continue to buy and use them. Lokprogrammer sold separately, of course... And I have to mention FSH. Great prices and really fast shipping and careful packaging! Good work, FSH!