Following the below reasoning.... all of the current swept wing airliners and business jets have a problem with "very bad design"!!! I hope all the Lancair drivers out there will ignore those who wish that an airplane could be designed to go really fast and really slow in the same design. Particularly the IV needs to be flown with the respect that a high performance airplane demands. It is well known how to handle high performance aircraft and doing deep stalls is not on that list. LOBO is your best source of what our best practices are based on experience gained to date for all the Lancair designs.