Schleicher pneumatic tube plumbing question

I've dispatched this question to the dealer and factory, but need to
troule-shoot quick so trolling here. I have a 2008 Schleicher ASG29
with confused instruments following some repair work.

My question is, in its factory configuration, are the three lines from
the multi-probe free of joints, splices or connectors all the way to
the instrument panel? (I'm sure this is the case for the TE and Ptot
lines, it's the static I'm curious about.)

I'm a little unclear about the total Pstatic implementation, with both
an E-Systems multi-probe and what appear to be static ports on the
fuselage a meter north of the rudder. Are the two combined?

~ted/2NO

ps the symptoms a varios appear to operate without TE compensation
and the ASI is not correct, mostly floating around 40-50% of what it
should be reading. Altitude readings correct on altimeter, 302 and
LX7007. The LX's vario's average always read 0.0, even when climbing
it what felt like very strong wave.