The advance plate for Moai 130 is
Laser > Glass > FEP > FEP
This helps to reduce suction between FEP and glass.
The Moai 200 Advance plate is
Laser > Glass >PDMS > FEP > FEP
The PDMS does help with getting more reliable prints.
You could do this yourself, the trick is will you replace the entire glass + PDMS layer or is there a way to remove the PDMS without damaging the glass?
You risk the chance of ruining your vat and resin leaking, but if you are willing to take the risk it may help.
Simply adding a 2nd layer of fep ontop of glass then your resin FEP helps.
There are two forces to overcome during each peel.
A - Peeling the cured resin off the FEP / PDMS
B - Releasing the FEP over the glass
PDMS is great because it is directly stuck onto the glass in all surface area, not just on the edge of the vat and rejects resin very well. the downside is that it degrages a lot faster.
With your idea, one must make sure the PDMS is stuck well onto the glass and does not get pulled away with the fep.