I didn't even consider 'Positional Height', on the Weight. That might be a good point, and why so many TE fail the conversion.
I did notice that a Top 5 RB in our League is 231 lbs. So not everyone has to be 217-220.
And again, I believe other aspects impact a Players Performance. I have a Bad Offensive Line, which I feel negatively impacts my QB and RB (along with Bad WRs having a negative impact on my QB).
I'm working to fix this, with more STR and Run Block at the Point of Attack. This obviously won't help the QB, but due to a severe lack of Speed he may be a lost cause anyways... so help the one I can help, which is the RBs.
For instance, Sergio Phillips is also a Converted TE. He weighs 255 lbs. He averaged 4.7 YPC with a Long of 39 with 2 TD on 56 Carries.
This is slightly better than Winfred McMaster, an actual RB, who put up 4.5 YPC and 0 TD with a Long of 39 on 76 Carries.
Behind the exact same OL. So Sergio, a Converted TE, can do better than McMaster, an Actual RB, behind the exact same Line. BEFORE Sergio loses ANY Weight.
Leon Arana is far better than Sergio at virtually everything... except Ball Carrying. It may turn out that 90+ is REQUIRED, to which I'll have to convert Leon Arana back to TE since he'll top off at 87 (unless he has a Boom an exceeds his expectations), as Sergio Phillips already has 93/100.
So that's what I'm looking to study, the difference in Ball Carry and the Impact it has on Performance. The ONLY thing that would grant Sergio a better chance is his Ball Carry. We'll see if Leon improves as his Ball Carry goes up, to the point of being a 4.5+ YPC kind of guy, like Sergio.