Correct on both points.
Earlier this year the lab I worked at had to replace their existing mounter as supplies of mounts to fit it had ended. It used two part mounts which relied on very precise fit to give a good seal and the tools used in making them wear out and need regular replacement or you lose that precision. That was just too expensive and no longer made economic sense for them to continue making them so we had to switch to GePe which aren't as nice but come ready assembled and don't need such accurate moulding.
As for mounting by hand, ok if it's just the odd film but any quantity ...... :blink:

