When the Flightstore product came up, we had about two month's time to put together only a selection of aircraft that was desired to be included from each of Warbirdsim's main FSX products. Having been provided that amount of time to work on it, I went through each of the aircraft selected and revised everything that was needed to bring each aircraft up to the same number of features and latest details (this was one of the points that was raised), so that they all meshed together on an even playing field. For the P-51B/C's, they aren't fully updated to the standard of the "D's", but given the time we had, I changed out items that I could with newer items from my work on the "D's", such as the prop blades, exhaust, landing gear, pilot, drop tanks, materials (added specular maps), gun sight reticule, and I built some new bomb racks (P-51B/C type). Only the aircraft selected for this product were worked on, so all of the rest from each main product that didn't get incorporated have not received that attention (for instance, there are only four P-51B/C's included). As much as I would like to offer the same updates for all who have previous Warbirdsim P-51B/C products, it just would be out of disrespect to Flightstore to do so (at least in my belief), which has gone to such lengths to produce these boxed sets. I'll be the first to say that the product isn't for everyone (especially if you already have a hangar full of Mustangs, with a majority of those already covered by this Flightstore product), but it is what is, available to anyone who it might suit/interest.