tiff whilst i see the point you're making, consider this...

what "excuse" can you use for not running a 3bar map sensor at that boost?

"i was too pikey to buy a 3bar" is the only one i can think of

for 2+bar boost applications there are a lot more "issues" to resolve when not using a std marelli 3bar map sensor... so a lot more reasons to do things this way :P

whereas you're just too much of a gypo to buy a proper map sensor