Beautiful, Mark... would love to Beta-test anything you have made changes to so far.
Making the ship Modular sounds like a great idea. Having the ability to customize and configure a monstrous beast would give everyone much more replay option, and balance out to the realism of development. If it works, this would greatly enhance our inspiration to tinker and build.
A Heatshield (ablative or not) sounds great too, but it's true getting aerodynamics to work as advertised by Elon should stay a top priority in my book. I'm still unsure how easily this 'bullet' will ultimately turn, testing and developing control surfaces of my own, investigating how the other early ITS designs out there are working (and not working).
I'd be happy to offer back more direct feedback, share my own design mods, whatever you need to keep your development on this going, inspiring more peeps to the real world engineering table.