Although I'm trying not to let my mind wander too much off my main rebuild project, I sort of have to consider how to proceed with my second 10ER as I'm working on the first one. The main reason I'm splitting time between the two is that I now have numerous options for motors, and am trying to decide what purposes I'm most likely to use each one for if I keep both. I made a spreadsheet listing all the normal purposes, listed by horizontal/vertical mode, and my likelihood of needing those functions, and predicting the frequency of use of each function. Hopefully that will help me decide the primary functions if both machines are used on a regular basis, to prevent having to switch positions all the time. I have scavenged the 2.4HP DC motor from my old treadmill, plus last weekend picked up a 1.5HP Baldor 3450RPM motor off CL for $40. I also have the original 1/2HP GE motor that came on my first 10ER, and an odd, overly large 1/2HP Delco motor that came on the second one. I'd prefer not to use the Delco motor, as it is way too large a diameter (it was actually resting on the bench when I got it, with the speed changer belts installed). It also has a reverse switch installed on it, and looks like someone bashed it on something else hard enough to bend the switch around the nut that holds it in the motor case, so I assume it needs some attention. It also is the only one with a 5/8" keyed shaft on both ends. That motor might go to some other purpose.
The double tilt design still seems like a worthy goal, so I gathered up some parts I had scattered in various storage areas to see if it would be practical to make a rigid, stable bench that would cantilever off one end so a pivot could be placed underneath the headrest end a foot or so in from the end. I would be hesitant to use two pivot bases only because I could fairly easily switch my 4E jointer headrest to this other machine if it were designed using normal dimensions and bolt hole locations. I'm thinking at this point I would like to use the Baldor motor without the speed changer on the double tilt one, and easily achieve 8-10,000RPM for under table shaping/routing with the spare pulleys I already have. I think the critical piece to this design will be this trailer stake I mentioned before. I would like to place 1 1/2" thick material under the headrest and pivot base, but not connected in the middle. I would then use the trailer stake/C channel, bolted underneath the two "bench pieces" to span that gap, but also to create a very strong pivot point on underneath the bench. I also have 4-5 4' lengths of heavy T-bar material I can use to create the lower frame.
If I did this, I would likely use this second machine as drill press, both over and under shaper/router, and possibly table saw with the 3450RPM motor and potentially much heavier bench. I would then use the first machine I purchased for the lathe, disc sander, bench grinder, and jointer, with the 1/2HP motor and speed changer or variable speed DC conversion. I'm open to suggestions as far as which motor should go where or power what functions. The only bad thing limiting the use of the 3450RPM motor is that its start capacitor is directly opposite the mount plate, so it would have to be moved if that motor were used over a bench (as opposed to wall mount drill press, etc., where what's behind the machine can be easily modified). Something that might allow its use on the double tilt 10ER would be if the bench "halves" under the headrest and pivot base were thick enough to let the capacitor clear whatever support is underneath. I've gotten some ideas about the motor from this video: https://www.youtube.com/watch?v=bEl4ghRIwbs