Thanks for the insights. That all makes perfect sense to me, and is why I am definitely going down that genuine 15xx and 3135 path. It's also why I am going to build a 5510 versus a 6538, so I can avoid the 1030 movement. I might ruffle some feathers if I end up doing what I am considering, but I am thinking of using either a 1560 or 1570. I know the vibration rates are different for both of those versus the 1530 that was used in the 5510, but those movements are much more readily available. I only found one 1530 during my last casual search, while I found several 1560 and 1570 movements, all fully serviced.
I found a serviced 3035 the other day, and since it was $800 cheaper in price, it got me thinking about a ceramic no date build. Then I saw a few gen no date ceramics for sale on Chrono 24 for $6Kish. It made me realize that the only way to do a gen parts ceramic build and actually make it cost effective (when compared to the gen watch) would be to go with a 3135 movement and build a 116610.