Constant Aviation, a division of Nextant Aerospace based at Cleveland Hopkins International Airport, last month delivered its first Pro Line 21-upgraded Beechjet 400XP. The baseline price for the installed upgrade is $390,000, according to the company. Additional options include a fourth display, integrated flight information system with electronic charts, XM graphical weather and a Waas/LPV-capable FMS. The avionics upgrade is part of the Nextant 400XT upgrade program, which also adds new engines and interior to the Hawker Beechcraft 400A/400XP.