With respect .............
Carrier was made as requested.
Lever? Leather?
If I get rid of the trigger hooks, lads (and girls) might get a bit fed up picking the rabbits up every 3 seconds.
It's easy to offer suggestions (nice way of saying criticise because we're all friends on here now and I'm not allowed to be nasty) when you think you know best, my suggestion to you would be to perhaps produce something yourself, get someone on here to trial it for you, then offer it for sale, and let's see how you like it when someone comes along who knows better ..............