I think it would be beneficial to be able to have access to features only found in the ultimate package by either a "pay per week" structure or be able to use purchased credits for advances features. There are several people who would make use of the advanced simulations as well as 4 axis machining capability. For many it is a major leap to pa for the ultimate package. Many may not simply to use it only occasionally for simulations or advanced manufacturing capability. I do not believe this method would cannabalize your current market offerings, only make it more available to more people. I hope you'll consider such a move.