Changed crank lengths, will my vector power meters be accurate on the trainer?

OMGgg, Are you serious? I missed that I was supposed to account for this. This may very well contribute to some of the issues I was having in training. I travel for work and carry Vectors to throw onto spin bikes at hotels and gyms. I have never thought to change/account for crank length.

I ride 175mm on my road bike. Isn’t the “standard” length 170? Not that I’m going to go and correct anything now, but say I did my ramp on the 175, what would that mean for my workout on a 170? Would it over or under estimate my watts? I’ve always felt like it was way easier to put out numbers on my home bike. Granted that could just be because it’s my bike, but I secretly hope that if I did the test on a longer crank and moved to a shorter crank, that it would underweight my output (i.e. I’m putting out 350 in reality, but the vectors are reading as 325)