I was actually in the loony bin when I checked out the forums and found out you guys missed me. :I
That helped a lot, comrades, thanks!
As for your alternative, it's not practicable because the '030 PDS is on the slow side of the PBX (?) Bridge IC. What any sane person might try would be to hack in at the RAM expansion card level which is on the fast side of the '030 Bridge bottleneck.
One might also try to implementing a larger, more modern memory subsystem on the RAM Card/adapter . . . maybe even see if the author of RAMDisk+ was still around to implement his little gem for the hack or to provide the source code for said utility. This would allow for an additional speed gain for the Duo aside from the processor upgrade . . .
. . . and might be a worthwhile and much more easily accomplished acceleration method that should fit inside the Duo, given the extra real estate available in the modem bay . . .
. . . but you'd need to be just a little bit mad to attempt such a thing I guess. :-x
BTW, I was playing with a Duo/MiniDock combo and the HP 23" 1080p Monitor and noticed that if you boot the Duo with the lid closed, the LCD remains blank and the active screen pops up on the external monitor . . . kinda like the DuoDock's behavior . . . which might lend a little more credibility to the notion of grafting a stock MiniDock DeclROM into the DuoDock to regain the services of the balance of the DuoDock's subsystems lost by disabling its DeclROM. This MIGHT allow for lidless 'Dock LCD operational bliss, regaining lidless/DeclROMless operability of the LCD concurrently alongside an external display without utilizing a precious NuBus slot!
. . . but one needs must be more than a little bit loony to give that Hack a shot . . .
JT :-x