[Iguana]

slanker, at this point, this is just a hypothesis. We are evaluating some feed back from members to see if this theory is going to hold water.
But if it proves to be correct then;

The tunica is enlarged mainly by:
1.) stretching (whether longitudinally or laterally) - resulting in plastic deformation
2.) hyperplasic growth triggered by sustained stretch)

Smooth Muscle is enlarged by:
2.) hyperplasic growth - triggered by stretching, elevated blood pressures or volume (usually achieved by jelqing, clamping, pumping, etc.)

Your BPFSL indicates your maximum tunica length. Your BPEL gives you the maximum length your smooth muscle can expand the tunica. The theory is, if there is a large difference then you do not have enough smooth muscle volume to adequately fill the tunica. The result in this case, should be poor erection quality. The closer your BPFSL gets to your BPEL the better your erection quality should be. In this case you would want to target the smooth muscle for growth to maximize tunica expansion.

In the case that your BPFSL and BPEL are very close or equal, your erection quality should be very good. In this case you should focus on stretching the tunica and build smooth muscle together or focus solely on the tunica until your BPFSL to BPEL ratio increases. Meaning your tunica is being stretched. Then focus on building smooth muscle to "fill in the gap."

We hope if this shows promise to publish a better explanation.