AndyMark SuperShifter Encoders

[Abrakadabra]

Has anyone actually tested the encoders that come shipped on the AndyMark SuperShifters? They're made by US Digital (US Digital E4P-250-250 ). They have a rate of 250 cycles per revolution, or because they're quad encoders, 1000 pulses (interrupts?) per revolution.

Everything I've read says that this interrupt rate is pushing the upper limits of the RC, especially if you are using multiple encoders (we're planning to use two). The trick is that since they are mounted to the final output drive shaft, there is no opportunity to reduce this rate. On the other hand, knowing that AndyMark always optimally engineers their products for use in FIRST competitions, I would think that they picked this particular encoder for a reason.

Should I be concerned? Do I need to look into some kind of divider card as well?

Thanks for any info.