Replacement D420/2 to D420/3, what assocoires are compattible?

Dear all,

I have a D420/2 with a number of extensions, and I'm still happy with it. But I'm looking for a D420/3 and what extentions from the D420/2 I can still use on the D420/3. I have asked Stepcraft customer support and the answer was short and clear. None of my extentions on de D420/2 are usable on the D420/3. But I have second thoughts about this anwer.

For instance:

I have a 4th axis extention board. If I look up the web site for an extention board for the D420/3 then for the extention board there is no mentioning for it to be specific /2 of /3. What is provided on the web site is usable for *any* version.
Do I have to buy a new extention board or not?

I have a aluminium T-slot table. At this moment in time the D420/3 T-slot table is out of stock and the D420/2 T-slot table is no longer available on the web site. But comparing the D420/3 measurements for the T-slot table shows exactly the same sizes as for my actual D420/2 table.  T-slot tables for a D600 or D840 does not show any differences in measurements and the /3 version has two rows of holes added to the table. (Which I can drill in my D420/2 table myself... with my D420/2 CNC machine for instance 😉
Must I buy a new T-slot table of can I drill a number of holes in my old table?

I have a dust collector, a few rails and a magnetic clickable dust shoe. For the D420/3 only the magnetic clickable dust shoe is provided on the web site. It looks identical to the one I have vor the D420/2.
Do I need to buy a new dust shoe or will the one I have also fit?

Other questions such as 'Do I need to buy a new licence for UCCNC' I have not yet looked at.

All together, if I need to buy everything new then I will need a substantial bigger budget than just replacing my D420/2 with a D420/3.

I get feelings of dissapointment and becomming ripped off by a company that so far have been supportive and very reliable to me. I do want to upgrade but if I can't get any good answers on *why* I need to buy all my extentions again I rather have a look at some other machines.

Is there any user out here that has upgraded from /2 to /3 and have some hands on experience with one or more of the extensions I mentioned before?

Kind regards.