I think the EAS situation is like this:
feasbu: dumped from EAS Budapest
feasgla: first dumped from a Private Line, later dumped from EAS Glasgow
feasglaa: dumped from unmodifed EAS-C Glasgow
feasglab: first dumped from EAS Glasgow, later also found in Private Line

(feas: pre-Budapest rom not dumped yet)

For the Saitek modular boards, I would add the Maestro first since it's the most basic one. A service manual is available, it includes the schematics. The problem right now is still incomplete 6301 CPU emulation.

The Sparc module CPU is Fujitsu MB86930-20, aka SPARCLite which is a derivative of V8.