Whitby is worth a look, see the Abbey, have a sail on the HMS Endeavour, have some really nice fish and chips and the weather might be nice enough to enjoy the beach.
https://www.aliexpress.com/item/1005004873647284.html? in a L/XL with Team Wendy pad (or rips offs) https://www.aliexpress.com/item/1005005610582754.html? (sorry for the shit images but should give you some idea)
Airsoft fest is run by Zeroone right? If it was me I would explain the situation and see if I could ship to them. Another option would be to ship them in bits and get someone with an exemption to put them back together for you.
Welcome to the forum and good luck on sorting it out.
Get a good 2 point sling. The Ferro Slingster is the goat https://www.tactical-kit.co.uk/ferro-concepts-slingster-19772-p.asp copy https://www.aliexpress.com/item/1005005542124269.html? it allows you to adjust it on the fly so can pull it tight to the body to give your arms a rest.
Get some dumbbells do curls. "Woman the F up"
Edit: Welcome to the forum BTW
I would swap the whole hammer housing over see if it sorts the issue. Next point to check is if the mag is sitting as high in the frame as when in the TM. Next is to sell it and buy a GHK :P.
Hoe you get it sorted.
Not sure if it might be still a thing but when I was in the industry shipping company's used to offer a flat rate for everything. So £5.99 to send a pen or an industrial printer.
Past ANSI Z87+ and EN16321 Standards https://trittech-us.com/en-gb/blogs/air-raiders-development-updates/air-raiders-pass-ansi-z87-and-en16321-standards