All I can say is that I had a small part in refining the compact jig. It was insightful passing my thoughts and ideas to Benchies Go Boom and then watching them come to life. I told him something ain't right, he ask some questions, I provided pictures and measurements as best I could. He fixed stuff, sent me a new version, I tested. By the third version, as best I can tell, his jig was dang near perfect.
I get that these frames are not easy to get or as cheap as they once were. If you want the highest probability of drilling holes in the correct place after working on you 76% , spend some hard earned $$ on the Benchies jig.
I purchased the V1 jig on my own. I told him something was off. He corrected the jig on his own and sent me a new version. It needed some tweaks. I gave him some information and he fixed it. I paid up front for his jig and he stood behind his product until it was good to go. I'm not sure the jig on Modulus is as refined. He provided nothing to me for free other than a corrected jig.
Modulus is the unassociated jig seller because we all know that jigs and frames need to be separated at birth to make it NOT easy to build these. Just play the game. All I'm saying is Benchies makes a good product that can drill more than one frame and do it correctly. Roll your dice as you see fit but I would roll them towards Benchies goes boom. I have no idea if Modulus tested or even cares if the jig works. Benchies has and does.