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Step 4Assemble the Down-Tube Support & Outrigger
Take the down-tube support from step #2(T-fitting with the half-pipe cemented to it) & cement the 16" length of pipe into one end. Set it aside & let it cure.
If you haven't already dry-assembled the 90 degree elbows to one side of the base supports, do so now (don't cement them). Take the 52" pipe for the base support outrigger & measure its proper length. Set it next to the 90 degree elbows & mark off the correct length - including the length that will be inserted into the elbow fittings. I recommend you err on the long side with this one (you can make corrections & cut more off later). Cut the pipe to the length you have just measured, then dry-assemble the 90 degree elbows to it (be sure to fully insert them), & try to dry assemble this outrigger to the base supports. If necessary, cut the outrigger pipe a bit & try again. (My dad used to joke "I cut it 3 times & it's still too short".)
Once the outrigger fits correctly, you can choose to cement it in place, or leave it as a dry-fit if the fit is tight enough (I left mine as a dry-fit & it works just fine). Now get the downtube support assembly that you cemented earlier, & pre-assemble the lower end into the cross-fitting (the only end remaining that is not already assembled to something). The half-pipe that will support the down-tube should be rotated straight up. If you are confident you can align it properly without without alignment marks, go ahead & cement it. Otherwise, use the dry-erase marker for the alignment marks & then cement it.
You are nearly finished, but before going onto the next step, you need to let the whole assebly cure for at least 8 hours again before putting a load on it. And the next step requires that you put a bike on it to do the final fitting.
If you haven't already dry-assembled the 90 degree elbows to one side of the base supports, do so now (don't cement them). Take the 52" pipe for the base support outrigger & measure its proper length. Set it next to the 90 degree elbows & mark off the correct length - including the length that will be inserted into the elbow fittings. I recommend you err on the long side with this one (you can make corrections & cut more off later). Cut the pipe to the length you have just measured, then dry-assemble the 90 degree elbows to it (be sure to fully insert them), & try to dry assemble this outrigger to the base supports. If necessary, cut the outrigger pipe a bit & try again. (My dad used to joke "I cut it 3 times & it's still too short".)
Once the outrigger fits correctly, you can choose to cement it in place, or leave it as a dry-fit if the fit is tight enough (I left mine as a dry-fit & it works just fine). Now get the downtube support assembly that you cemented earlier, & pre-assemble the lower end into the cross-fitting (the only end remaining that is not already assembled to something). The half-pipe that will support the down-tube should be rotated straight up. If you are confident you can align it properly without without alignment marks, go ahead & cement it. Otherwise, use the dry-erase marker for the alignment marks & then cement it.
You are nearly finished, but before going onto the next step, you need to let the whole assebly cure for at least 8 hours again before putting a load on it. And the next step requires that you put a bike on it to do the final fitting.
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