Consider building a small block for underneath the front wheel. By raising the bike back to level then you will feel less like a downhill.Fit a scrap tyre to the rear wheel - rollers are hard on tyres, and you may as well wear out an old one.+1 to getting the fan to cool you as well - road biking provides draught to cool you, I perspire like crazy when I stop at the lights or at the end of the ride. The cooling fan will help alleviate this and reduce the risk of overheating.Finally, time's moved on since this was posted. Zwift is worth looking into but you need a bunch more sensors.Or obey Velominati Rule5- get out and ride. If its scary, find a bunch to ride with for company and support :)
Thoughts - if you set the crank up so the two "inside" feet were oppposite then you could slide the seat almost completely central and it would be easier to ride solo. You could also leave the original steering tube and arrange some kind of release for one of the handlebars to move it to the middle position again.As a 100 KG person I'd be terrified of the cantilevered seat support snapping off, bending, or even simply rotating under me. Two longer seat tubes would provide more structure, but the framing would increase heel strike risk. As is, the rear of my inside thigh could touch the horizontal seat post/beam.Who has control of the brakes/gears?And a non-technical question, who is "legally" in control, should there be any problems?
I've seen one of these with wheels that had off-center hubs and were out of phase. So at slow speeds the horse did a kind-of gallop. Would have been hideous to ride at speed though.