Bought a used Alpha Pioneer but is has no clamps. clamp bases measure 12.2 mm. need clamp recommendations. will also be stringing tennis rackets. what about these? https://de.aliexpress.com/item/1194...68#1000022185#1000066058#0_668#3468#15609#207
Found some others. https://www.tennisman.de/en/Other/Stringing-Machines/Spare-Parts/SUPERSTRINGER-Clamp-Badminton.html or these. they look identical https://www.pros-pro.com/de/zentralhaltezange-professional-12-mm.html
All these clamps is more or less the same OEM, and also your only choice for 12,2mm posts...but works well.