I have loads of experience with these things.
Simore is a big bad no no! Terrible service, huge prices and above all else the product sucks!
I use dual sim adapters a lot for customers in my brothers phone shop and we're currently using the updated Magicsim 28th PLUS 'cutting' version.
Its a brilliant product
Beware of the fake "29th gen" it doesn't exist (email magicsim if you want to confirm this).
Anyway i'll give a shoutout to the guy we get ours off "directdevices" on ebay. I don't think he has the 'cutting' versions listed on ebay but if you message him he has them in stock. Honestly couldn't recommend a better service.... over the past year we've bought a lot off him and from the very start his customer service was amazing. Detailed help every step of the way.
Anyway, thats my rant over. I felt compelled to recommend him.
Hope this helps guys. Oh and if anyone has any questions i'm happy to answer what i can. Like i say, i use these things a lot.