I've not finished with the batons between but was going to put lots up, trying to keep it low cost at moment since i might have to do other side and need all spare cash for escort. the parts i put up there will be in cardboard boxes mainly, couple bumpers and hubs etc. i can hang off a joist and it only bows a bit (second from the end furthest from wall) and i'm not featherweight at 16st.

I figured if i drill the boards and screw them down like every 3 inches they'd keep it all nice and strong since they're TnG?

I'm a detailer not builder, so it'll be neat enough lol. Just wanna make sure the flooring won't go through when i'm stood up there. I can always fire loads of bits between the joists like i've started doing...