Ok I was able to try out your sugesstions today with a GPS.
I set the TS to 2500 (+/-10) to see how it compared to GPS.
I noticed on constant acceleration and cruise speed the GR was reading about 1 mph vs. GPS.
When I punched it I nitice that the GR was 5-10mph more that the GPS until I reached a constant speed where the GPS then caught up
Why would this happen? Is the GPS just that slow to pick up the change in speed?