When I meant a Time-Delay Relay on the turbo switch, I meant that the Relay contacts were is SERIES with the switch and not in parallel with it. i.e., until the Relay threw, the turbo switch was out of circuit. Only AFTER the Relay closed, only then the turbo switch could be pressed if desired.

This way, the Time-Delay Relay is simply connected across the Motor, so when power is applied to the motor, the Relay then times and then after a preset time period closes it's contact enabling the turbo button if so desired. If you take power off the motor, the Relay drops out ready for a new timing cycle.

A couple of transistors, a Capacitor and a splattering of Resistors and you've got your circuit for about $1, no PIC, no software, and pretty much supply voltage independant with no worries about having to generate a clean 5v supply for the PIC.