Wooooo! I got it welded! After working for 15+ hours this week I got a jig made of 3/4" MDF and leftover 2x4 scraps. I did my best with the tools I had; the miter saw was very useful! I then prepped the rest of the tubing, with a few different options for alternate welding strategies. I am not a welder, so I wasn't sure which would work best.
I took it over to a friend's house and he worked for three hours to get it put together while I made inconsequential design decisions. There were quite a few loose ends to tie up but it's together now. I'm gaining tons of experience that I'll be able to use on a hypothetical version 2.
When I got the bearing races pressed back in at the LBS I had them weigh the bare frame without fork. 3 lbs, 14 ounces. Not bad for a steel frame.
If this is all the further I get before the show at work, that's okay. I'm tired and broke, haha.
Next on the list:
-Get bearings and a stem that fit the rear steer tube; install.
-Center the crankset to get the chainline reasonable.
-Grind the front dropouts longer to have a little chain tensioning capability.
-Mock up rear brake mount.
-Start to build seat.
-Acquire heim joints, etc to hook up the remote steering.
-Add cable stops and other cable routing hardware
-Install shifter/brake levers/chain
At that point the bike should be rideable around the block.
Updated list. Welding cost more than I had hoped, but I could have planned the thing better so it took a lot of time. Live and learn.
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Wheels
Front hub (Sturmey Archer XRD-8(W)) and 20T cog-....$166, Bikeparts.com
Rear hub (Shimano Deore disc front)-........................$21, Universal Cycles (UC)
Chrome 36h rims.............................................. .....$40, Calhoun Cycles
Spokes, store bought + nipples.................................$40, UC
Custom-cut front spokes.........................................$36 , Brooklyn Bike Doctor
Tires (Maxxis Hookworm)......................................... $40, UC
Rim strips and tubes............................................. ..$12, UC
Brakes
Rear caliper (Avid BB5 cable disc from my fatbike).....$free
Rear rotor (Tektro 160mm)........................................$20, UC
Levers, Avid.................................... .......................$free/parts bin
Front brake is a drum, included in hub price
Donor Bikes
Huffy [Granite?] (former winter commuter)....................$25/parts bin
-BB and frame segments
-Threaded steer tube
70's Schwinn Exerciser......................................... ....$10/parts bin
-65T chainring
-Minty Schwinn oval head badge
-Assorted tubing
-Minty BB bearings & cups
80s Free Spirit Dynasty 10spd...................................free
-headset for under seat steering
-(the rest of the bike will be donated to the LBS)
Raleigh Grand Prix.............................................. ......free
-head tube
-frame tubing
-stem, maybe
Steering
Rear headset cups, incl installation.............................traded for parts
SR aluminum stem.............................................. ......traded for parts
Bar ends (not sure if I'll use them)...............................$25
Other
Crank, one piece (Schwinn Stingray or similar).............$5, East Side Bike Shop
Pedals (Shimano SPD).............................................. $ free from a friend
Trek forks (2) to use for rear fork................................$free from a friend
Welding
Front fork.............................................. ...............traded for snow tires
Frame............................................. ......................$200
Frame welding jig
MDF 4x8............................................... .................$28, Menards
1/2 pint funnel x4 (to center headsets)......................$2
TOTAL
$672