On my previous, a 2002 Plus8, whenever I did a job I considered renewing fasteners. One example was removing the seats. The rear bolts on the runners were standard hex head. This head sat inside a channel so no room for a spanner or socket. Rather than wedge a screwdriver to lock it I used a small stilson type tool that fitted and held in with tape while undoing the nut. I replaced the bolts with socket heads and used a matched socket instead of a spanner/ hex socket/stilson.The front bolts left as they were as they had easy access.
To help try and ID threads I have a thread gauge and a stock of nuts as testers, kept in small labelled plastic bags. Spanner size? I have sets of metric/imperial/whitworth etc plus some odds and sods rescued from scrap for modifying for specific jobs.
