I have had a great time learning to treadle on my new/old Singer. The first few seams had some tension issues, but I was determined to improve the stitch.
I fiddled around with the knobs and dials, and finally resorted to reading the instruction manual (yes...the original instruction manual!) and got the tension and stitch length working well.
I was sewing scraps together and was amazed at how quickly I caught on to the foot movements required to work the machine, and it was so FUN! I was zipping along and enjoying the sound of the treadling, and how smoothly the machine was working considering it hasn't been used much, if at all, for years.
But then...the belt broke. Waaa :(
I asked the quilters on the TreadleOn list and got some great advice on belt replacement. So my new/old Singer is temporarily on the disabled list, but not for long... we should be back in business before you know it!