If they are going in a tray why not try the stamp holders, you can get different sizes pick the coin up see both sides and only a couple of pound for a packet full.
The coin wont move about and makes handling them alot easier.
Just buy the size that fits and a lot cheaper than capsules if you want a lot.
If your not sure what they look like go to the items for sale thread (Pennies High Grade ) i put the 1946 pennies in some although they have not been cut down or folded over. I only buy one size that fit both copper and bronze pennies and fold them over to go in a paper envelope , yours could go straight in the tray..
If you want some PM me as they are not the easiest item to find cheap and will pass on a sellers details.
Only an option for you ,maybe worth buying if only to put the RANG TANG in
Pete.