Hi Mark
The hack I ran for 3 years on my Levo Comp Fattie. All the electronic options on the market are doing writing to the same bit of code in the ECU of the bike - I looked at the code on my new SL and its still the same as for the Brose motor. The free LightBlue app lets you connect, look at and change the Hex code for different wheel sizes - that is all the Levociraptor is doing for you - at great expense. Each switch position is just writing a new code for different wheel sizes - in mm. and giving you a higher theoretical max speed. You will notice that the mission control App has a wheel size that you can't change - but a Specialized approved dealer can. Also the 15 mph /25 km limit is for Europe and the UK - its 20mph in the US so it is sort of legit to make a change