Let me try this one more time.
What we all, that being HT, Behmor 1600 etc etc... did last year or the year before has zero, squat and zilch with today. Rules applicable to that time are/may no longer applicable to today when a new program or design is involved. You can ship previously approved products BUT not one's with changes of consequence such as adding dials, thermocouples, programs or similar without receiving NEW approvals which are rated, judged, tested etc under the latest rules/ regs etc.
Unfortunately many times the safety houses only tell you these things AFTER the fact, not before so retooling of retoolings may be necessary both of which take time. It could be as simple as adjusting the location of a fan, the direction it draws in hot air vs. cool or something more complex, all overcomeable in time but none at the snap of a finger.
After all of that you then need to get insurance under the current mindset of the insurance companies, not the mindset of 6 weeks ago or two years ago.. today's mindset. That too evolves like those of the safety houses.
Let me give you a direct example, the side panel w/ fan we added. The small DC fan being plugged into a socket, that was already on the system board, adding 45 small breather holes, and 4 screw holes for securing said fan to the side panel, required two years from the time of concept to approval.
Point is..what appears to be and is an extremely easy add-on was anything but easy, simple or quick. Now try adding new motors, PCB, thermocouples, controls etc., while at the same testing for the changes in dynamics because each change facilitates a possible other change, that was unintended and negative to the desired outcome. Think finger in the dike, plug one hole only to create another.
In closing I'm a business person and I want to do nothing short of kicking my competitors asses, leaving them OTRD while working to meet the wishes/ desires of our customers both new and old.. but sometimes getting to that requires years of work and redesign while at the same time fielding SOS comments.. and I don't mean same ol' ----
Eric this is nothing against you, we all have our wants and desires..let me do my job, a job I take very seriously