As promised a quick review of the box I bought...
It's a Max box 380h115 from Trifibre for ?39: https://www.trifibre.co.uk/product/max380h115/?utm_source=google&utm_medium=ppc&utm_campaign=Shopping_Smart_v1&gclid=Cj0KCQiAoab_BRCxARIsANMx4S4Gbf5gOzP0iwhilc7mmbcXVgxn9thwI3ZZSKQRU5LSijvZzNfS89IaAkvoEALw_wcB
First appearances it's rock solid and really well built. The box is IP67 rated so I've done a very non-scientific waterproofing test; I put a few sheets of kitchen roll in it then hosed it down thoroughly and dunked it in a bucket of water. No evidence of any water getting in. Drill, spare batteries and the bag of plug, feathers & drill bits all fit with a bit of spare room for chocolate! The handle appears to be robust as do the clasps. First impression, at a 1/3 of the price, this is a really good alternative to splashing out on a Pelicase. Next test is to see how it stands up to being battered around in the caves on Portland.