So I have decided to go magnets and wooden cavity cover on my first build. 

I went with 6mm x 1mm magnets which seems ok but I think I would go stronger/thicker in the future. 

I also laminated 2 bits of sapele Veneer together 1.5mm  (3mm thickness overall) which seemed ok but it went bent/curved in a couple of days so this needs to be thicker too grrr! 

Has anyone used magnets and a 1 piece or laminated veneer for the cavity cover? If so what is your go to thickness and what size of magnets have you got good results from?

It’s my first build so lots of learning lol. Lived oiling her up the other day!