Penimaster Spare Parts?

I think I have misplaced a couple of the rods for my penimaster and I am in need of some more. I found the site where you can purchase replacement/spare robs, but they are like $180 for a set of 6. That is crazy! I can almost buy a new one for that. Does anyone know how I can alter my device to make it longer or have suggestions on where I can find some of these rods?

Also, I am getting some good erect length gains! How do I know when to increase the stretch and how much should I increase the stretch? Currently, I am not sure I am stretching my penis as it should considering the new gains.

Started: 6.75" BPEL, 8" (20 cm) BPFSL (1/2015) x 5" EG; Current: 7.8" (19.5 cm) BPEL, 8.2" (20.5 cm) BPFSL x 5.3" EG; Gains: 1.05" (2.625 cm) EL, 0.2" (0.5 cm) BPFSL x 0.3" EG

Short-term goal: 8" (20 cm) BPEL, 8.3" (20.75 cm) BPFSL x 5.5" EG; Long-term goal: 9" (22.5 cm) BPEL x 6" EG

Xtended's Progress Report