Excellent! I think there will be a small cave on Route 3 (next to be mapped). The kind of cave where you can only get so far in, for now, so would be great to test out those tiles :)
Just in case you haven't picked cave tiles yet, I may have some for you that I plan for a ROM Base that I inserted recently, that could fit, if you want to see?
Connections break on some maps and can just never be made ;_;.
Luckily I had an old version of A-Map, which can counter the problem :D Although I've heard that can lead to corrupting ROMs so I'm treading cautiously.