Forgive me if these are very old questions, long answered, I have just found this excellent site. Can anyone instruct me on RB250 nut tightness? The Rega/OL site makes the point that the nut should not be too tight. I remember when I was learning to cook getting very cross about the comment "cook until done..." and this seems like a similar sort of thing. I have built a plinth for a 301 using 45mm oak and I shall experiment with MDF although most people seem to think 301s need a hard material. Any tips on the interface material between the arm base and the plinth top? Also - last question I promise - I have +/- £100 in the budget for a cartridge..... any suggestions? This is a budget issue, if I could afford more I would! Suspension is via squash balls and spring egg cups........ Current desire is to run through an Arcam 9 to replace existing Merdian stuff of 25 year vintage so I will probably need an MC for the time being. Cheers, Francis