anyone use this thing? found it in the summit catalog and it looks pretty interesting. six way adjustable chip with economy reg gas,towing reg gas,stage 1 power high octane,stage 2 high octane, valet, anti-theft. part number JET-289136P $225.69 it also recommends using their low temp thermostat. ive heard that this will mess with the computer, is this true? is it worth it? im looking to replace the chip i have in now that requires high octane. it would be nice to switch to regular gas when the price at the pump goes up.