Actually, it looks like that motor might make things easier, given this Q & A from the page you linked:

Q: I have an automation control, but I have NO additional relays to tie the low voltage cable, can I still use the imPower motor?

A: Absolutely! You can wire imPower similarly to the single speed timer, tying the L1 and L2 connections to the filter pump relay on the automation control. The motor will run on HIGH speed for 2 hours, and then to the LOW speed for the remainder of the timer ON time. Note that the default lowest speed setting can also be changed. Please refer to the installation manual for details. Operational compliance of imPower may change dependent on local laws and regulations. Please consult your local government for a list of applicable electrical codes.

Getting controls right is one of the difficulties with 2-speed motors; many electricians do not know how to wire them. It looks like that unit can be effectively controlled with a single speed timer.