Hi Dave, I've had a bunch of projects scurry through the shop this winter. The big one was working with FreddyI's design for a Karlson slightly smaller than mine, but with an 18" instead of 15" driver. I shipped the test mule to him, so won't have it for the Do, but might modify mine with the knowledge gained. I'll start Shane's K15s this month; they'll definitely have the mods which should produce very slightly deeper base and an audible improvement in midbass and lower mid tonal accuracy.How 'bout you Dave - cookin' anything up to spring on us?