Not an E6 guy. But I do have opinions.
One - I always thought the E6 shared a windshield contour with the E7 and F3?
Two - I prefer nickel plating for ATSF Diesel sides, and either anodized or polished aluminum for simulted Budd cars. Just me.
Three - as a one-time mechanic for the SDMRR Museum, I rarely found bronze truck bearings worn out. If you run one of the Lionel models with bronze bearings, you will have to run eight hours a day five days a week for a decade before I would have to replace axles and bearings.
But I did put ball bearings in my "Log Mallet" - found no improvement in running at all, but discovered that mis-aligning a ball bearing even a teeny bit causes serious friction increase. Equalized trucks would need gimballed journal bearings. Press-fit would only work on unsprung trucks and perfect track.
Four - modern electronics is priced to recover development costs. Once you pass some large number of units, it costs more to pack and ship stuff than it does to make it. If most of Scott's customers want, say, QSI, it is cheaper for him and his customers to just put it in all products. I bet a stripped model would be more!
So just snip out the QSI (whatever that is) and put it on eBay. You will be $ ahead!
Again, opinion.
