.1 is quite a bit - almost 1.5 psi.
FWIW & off this topic: I've found that the Fatory WG is dead nuts on with respect to actual boost produced from a given spring.
The Tial used with a B&B typically and regularly overboosts by .1 bar.
3.4L, SC heads, 964 cams, B&B headers, K27 HF ZC turbo, Ruf IC. WUR & RPM switch, IA fuel head, Zork, G50/50 5 speed. 438 RWHP / 413 RWTQ -
"930 is the wild slut you sleep with who tries to kill you every time you "get it on" - Quote by Gabe
Movie: 930 on the dyno