[James Malloch]

A file might be easier if it's a tight space.

Screwing something like this on to the back side of the board might make it a bit more comfortable https://www.diy.com/departments/pine-half-dowel-doweling-l-2400mm-w-6mm/1821946_BQ.prd

Hadn’t thought of that kind of thing, thanks! Going to get some of this at the weekend: https://www.diy.com/departments/smooth-natural-pine-angled-edge-moulding-l-2-4m-w-20mm-t-20mm/1821911_BQ.prd