I never did adjust anything on my IP other than the ALDA. The ALDA adjustment did help significantly with smoke and with MPG when on-boost, but did nothing for off-boost issues. My city MPG is ~24 and highway is ~23 (though my highway speed is 80 around here) with A/C on. Not spectacular.

The body seals on my IP are leaking oil and since it has to come off for a re-seal, I'm just going to source a proper 3.0L IP and do the job once. You can bet after all the issues I've had with IPs that whatever goes in will be spit-shined and given the 3rd degree before it touches my vehicle!

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Current stable:
1995 E320 149K (Nancy)
1983 500SL 120K (SLoL)

Black Sheep:
1985 524TD 167K (TotalDumpster™)

Gone but not forgotten:
1986 300SDL (RIP)
1991 350SD
1991 560SEL
1990 560SEL
1986 500SEL Euro (Rusted to nothing at 47K!)