Do you reckon the lengths ofHey Mike. I have a fretless 21” scale blue Hadean that I can’t find flatwound strings for. Tried both Kala and Gali flat and black rounds. They fit my Kala acoustic/electric, but are too short for my Hadean. Any recommendations?
1) string between bridge saddle and back-of-bridge ball-end anchoring, and
2) nut to E-string tuning post would add up to at least 4 inches?
If so, check out the Pyramid 235 set
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If said extra length amounted to at least 5.5", the '23 inch' version of the Kala KA-BASS-4FW (a.k.a. Galli UXB910C), with its larger gauges, may perhaps be a better fit on a 21" scale instrument:
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(I believe you've already tried the 20.5" version, and verified it's too short for the Hadean solid-body.)

