Max at Pyramid Strings is great! As the OP mentioned, Max is willing to go the extra mile to make things work.
My Pyramid story begins with my custom made Ken Bebensee Baruke left handed 5 string fretless uke bass. The 23" scale length was ideal for my fretting hand where I have issues with my ring and pinky fingers.
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Prior to that I had been playing Gold Tone uke basses and using Road Toad Pahoehoe rubber silicone strings, and I had Ken build the Baruke using the Pahoehoes. The rubber silicone strings had a nice blooming upright sound and very low tension which was great for my fingers,
but they were an absolute PITA to install!!! Having to install, remove and install again several times as the strings stretched and their really fat gauge was a total drag. So I had Ken design the Baruke in such a way that if I ever found a string manufacturer that was willing to make normal tapes for a 23" scale bass that we could shoehorn a magnetic pickup to accompany the piezos.
Over the following months I contacted the biggies: D'Addario (we have no plans for 23" scale tapewounds in the future), La Bella ('we can't seem to make the intonation work'). I can't recall how I came upon Pyramid strings, but I contacted Max and he told me to send him measurements which I carefully made and sent to him:
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A few weeks later I received my first order of custom made tapes along with a bunch of schwag like the OP:
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Installation was a total breeze, but the action was extremely high due to the Pahoehoe strings and I had a gig coming up in a couple days. I was able to get thru the gig just playing up to the 12th fret and not beyond. Right after the gig I packed up the Baruke and shipped it to Ken for extensive surgery to squeeze in a magnetic pickup. After several months Ken sent some progress photos and right away I could see how wonderfully low the action was and couldn't wait to get the bass back to play it.
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The Pyramid tapes sound and play great and they last forever (like most tapes do). I did have Max make a few sets of roundwounds the same size just to play around with, but the tapes are what I use most. So many thanks to Max for taking on such a challenging project and making it all work.