Hello Glynne,
Here's the breakdown. The first three pics are the rear slide adjusters, extended with a mushroom headed coach bolt and
turned wood spacer with two odd sized washers. One to fit the top the other larger to spread over the back slot. (It's much easier to reach over the fence to adjust it).
Next, without the fence. The details of the slots in the back. These could pose a problem to do for you, unless like me you are in the fortunate position to have at your disposal a rather large milling machine.
The alternative of drilling out and filing the slots did not appeal to me.
The other side showing the layout of the star knobs. As with the back, the upper ones with a small spacer in order for them to pass without clashing.
These knobs are only temporary because I have on order from Axminster a new set that are somewhat longer than these(out of stock at present).
Front view!
Here shows a thin card inserted between the upper and lower front slides. When setting the fence, due to tolerance in the milled slots the upper and lower fence
can rub against each other so I insert the card, tighten the upper fence take out the card then adjust the lower fence. (If that makes sense)
The lower fence can then be adjusted as and when you want.
That's it!
I hope these pics are of some use,
Regards.
John. B