I recently received an EZ Lynk with Proven Diesel tunes. I was advised I could change the tire size but when using the tuner I only have an option for STOCK Tire size and it won't let me enter or change it to what I have on the truck (295/65R20). Does anyone have guidance or advice on how to to do this so I can calibrate the truck to the tires? I know about Forscan but from what I read it drops a CEL that doesn't clear so I didn't want to go that route. Thanks for any info you can provide.