OK I made a phone call.
Deckel had 3 factories. One one them was in Holzkirchen. They made castings, spindles, ...
In some restructuring the factory was bought out by 3 of the local business directors, but continued to supply Deckel, then DMG and later also made castings for FPS.
This was now GWF (letters of the new owners).
They also made the FP1 for DMG, but had no rights to it and were not allowed to sell it directly.
GWF later became insolvent, which would have meant that FPS would have lost its key supplier. So FPS bought out GWF.
They do not make the FPS machines there, but only make components.
FPS was formed by 10 guys of the Deckel Service organization to continue serving Deckel machines. It grew from there. As to Rights and patterns I have doubts. When Deckel ended there was a kind of free-for-all Phase and the future FPS guys had Access to everything. Things happened and with the merging of first MAHO and then Gildemeister it must have been difficult to reigns Things in.
The FPS machines have similarities with the Deckel FP, but there must be significant and multitude differences. Given their Heritage I would not doubt the Quality, even though some things seem cheesy to me (by Looks, never touched one).
How do I turn off the frigging auto-correct on this Computer!