Part of the issue is also whether or not your motor has enough power to run steel block as opposed to aluminium ones. In part this is a braking issue. If you are going to do a full size door you might be better looking for a machine with a sliding table section or to which you can add a tenoning table - this raises the work above the table and allows you to use tenoning discs which can give you a 100mm deep scribed frame/muntin, although the disc size is generally about 250mm to achieve this. Felderman has gone down this route and I'm sure he could proffer some useful experiences/advice.Roger Sinden":ux6dwf8q said:Really good point re 40mm vs 50mm ...it will be for doors/windows and so your point was very timely.
One of the few machines to offer this is the Felder - allows you to run router bits at about 15,000 rpm (?) so no good for small diameter cutters but an ideal intermediate step if you want to use router panel raisers, etc.Roger Sinden":ux6dwf8q said:I'll stick to the router table and so won't need interchangeable spindles ...unless I'm missing something else?