I think the Arredondo is a little different, though I haven’t used the FW locators. The Arredondo is soft rubber that maintains contact with the cases that buffers the movement. It made a significant improvement on powder spillage for me.
Using tek-loks are perfectly fine. They fit the DAA belt and they offer a lot of flexibility. For multigun I put them on everything, holster, pouches, shotgun caddies. They offer more flexibility than ELS, especially if you have limited real estate.
I chrono anytime I change powder lots. I also chrono in both winter and summer to be aware of any major swings in velocity due to temp. It’s also a good idea to weigh your bullets as manufacturers may change them over time.
I see so many recommendations for putty, the stuff is a mess, I would avoid. Leave your gun in a hot car and the stuff melts and oozes out. It’s a pain to clean out if you decide to go with a brass plug later. The C&H speed feeds are cheap enough now to avoid the hassle of tungsten pellets and putty.