beautiful work there... i love QRP tuners... started with BLT, then BLT+, then the KD1JV morse dipper, then KD1JV tenna dipper, then 4SQRP, then qrpkits SOTA tuner (really nice!)...
but my favorite now is the mfj 16010 modified with a Tayloe LED SWR indicator (qrpkits has a $5 board w/components)... fits perfectly inside...
i recently acquired an mfj Econo tuner and 16010 ST, but i am reluctant to modify those... the 16010s are common enough though