Snohomish, Washington 98290, ph. Ken already makes extensive use of lightweight materials such as fiberglass, and he found that ProtoStar diagonal mount assemblies are a good match for his creations. All from grinding and manufacturing the optics to building the mounts and drives. I have also written data reduction and modeling software for telescope design. I have seen, made and used many support and secondary holders and I must say the secondary holder from ProtoStar is the best commercial holder that I have seen.
Collimation stays in place even when the system is bumped around and the price is surprising low.
No tighten this one and loosen the other. If you need a new or replacement secondary support or holder the ProtoStar is the only one to consider. ProtoStar is a division of Flexible Precision, Inc.