NoOne N Particular writes:

I was just looking at the specs for the 2135TiMAX and noticed that the
specs say minimum hose size is 3/8", but the air inlet is only
1/4". Air consumption is listed as 5 cfm, but it does not give an air
pressure.

Anyway, if the air inlet is 1/4", why would it help to put on 3/8" qc?

Because you're having a lot of air available upstream of a relatively
short section that's only 1/4".