I’ve been using the electron gear right from the beginning two years ago with a GS-200. (Same as LG-15). They dropped right in, no dremel needed. They have worked flawlessly. Recently though, the touch svreen on the GS-200 stopped working so I can’t manually retract or extend the gear, but the unit works fine otherwise. I intend to get another GS-200 as soon as I find the time. I’m using the LG-15 on both of my T1 minis and they work great too with the JP gear.