I've been using my Sinar F2 for close to 30 years. Back then I, Sinar P was unaffordable. I noticed on Ebay that some folks are dumping their Sinar P cameras for a fraction of what they originally sold for. I'm wondering if I buy Sinar P parts and integrate it with my f2 system? Can I use Sinar P front and rear bearers with my system? Is there a difference between Sinar 8x10 P standards and P 4x5 systems? :confused: Are Sinar F and P systems truly modular?