Chippiegeoff, sounds like you dropped on there, though they were probably wanting to make amends for the distorted table too. I'm always on the lookout for old cast iron, but my mill is too small to machine a table for the Hegner, so I'll look out for the formica coated MDF. Regarding the insert, I wonder why anyone would want anything other than a slot for the blade? It's not like there is provision for turning the blade 90 degrees like on some cheap scroll saws. I made an alloy insert to replace the plastic one and made it a very tight fit so it's difficult to remove.
Graham, I think perspex is probably too soft and would mark very easy, though if I find a piece big enough I might give it a try.
I spent an hour yesterday polishing the table with 480 and then 800 wet and dry, I would have gone finer but didn't have any in stock. Then I polished the table with Solvol Autosol using a Scotchbrite clone and buffing with a soft cloth. It got most of the milling marks out of the table and made a big difference to the feel.
John51, I am sure I read, probably on Steve Good's forum, about using a sub-table to extend blade life. I suppose it depends on how easy it is to fit whether it would be worth doing. Knowing my patience, or lack of it, after the second time of fitting it I would say "to hell with the expense, buy more blades." :mrgreen:
Martin.