Is there any equivalent to the speedsocket on the market for karts? https://www.speedsocket.uk/
Basically its a socket that stores the nuts as you remove them and allows for a quick reattachment.
I have been in touch with them, they do a 10mm nut for a quad/atv but there is a 60 degree taper on the nut and they would require machining flat. Possibility the socket may not function then.