BTW, to those who have the first Merlin rta's, I had one that the 510 contact screw broke on, now the screw on other Merlin keeps coming loose. I think I found those screws, at least someone posted in the feedback ratings these screws work https://www.fasttech.com/products/5298603 Might be an idea to get some of these to have on hand, apparently there are others who have problems with the screws going bad. 50 of them should last a lifetime LoL.
