Hi Doug,
this is one of the few Beograms I haven't actually worked on myself which is why I referred you to the thread in question so I cannot really help with the screws you mention. However the MMC10E is basically a USA market MMC20E (don't ask why) so the tracking force should be set at 1.5g. As the cartridge is really quite aged there are a couple factors to take into consideration.
1. It may well have had a fair few playing hours so the recommended tracking force may need to be upped a touch.
2. The internal suspension may have hardened and could affect the tracking, again the tracking force may need to be upped a touch.
I wouldn't go any higher than 2.0g though as this will put undue pressure on your vinyl, reduction of which was one of the design principles of the light weight MMC range of cartridges.
Chris.
The use of metaphors should be avoided like the plague. They're like a red rag to a bull to me.