ASW-20C Fuselage mounted TE probe question

I am having trouble with static/TE input from my fuselage mounted TE probe. I think the tubing is original issue (1983 ASW-20C, experimental) and not sure if the probe is getting a good tight seal when installed. Instrument indications are minimal on mechanical and electronic varios compared to info from my seat and altimeter winding up/down. (I have gotten pretty good estimating thermals based on rate of altimeter winding up-bonus?) Instruments have been tested and are in good shape.

My first idea would be to replace all tubing to the probe. It is a long way back from any access to get hands on the inside of the fuselage. How would one approach getting new tubing pressed onto the barb on the inside of the fuselage?

My second idea would be to replace the pitot probe on the vertical stab with a modern triple sense probe this winter. It is relatively easy to string three new tubes through the fuselage using the existing tubes to pull through. It would require some composite work to core out existing pitot tube receiver and replace with new triple sensor.

Has anybody tackled this problem? If so, can you share your insights. Reply on forum or at generein located at good old AOL(e mail account from the last century, actually compuserve . . .)

Thanks
GR