Sub Sonics and woofer pumping

Not that I think it’s relevant to your immediate problem, but increasing the weight of your counterweight actually has the paradoxical effect of reducing the effective mass of your tone arm, because effective mass is affected by the square of the distance between the pivot and the center of mass of the counterweight. Therefore, when you went from 140 g to 180 g, you then moved The counterweight closer to the pivot to reset VTF. Thus you reduced the quantity that is squared in the calculation. You actually would be better off to use a slightly lighter weight counterweight and move it further away from the pivot. If you want to increase effective mass.

As to your immediate problem, absent undetected and unknown problems with your equipment that none of us are privy to, I suggest you need to move your turntable to another spot in your listening room, and see if that helps. Putting it on the floor like Miller carbon suggested is also a reasonable idea, but put it on the floor in another part of your room, if you can.

Curious as to why and when you changed to BearPaws and what difference you noticed?

Never said what TT support/rack you’re using,?

Just looked at your system page. Here’s my assessment:

I know we have to deal with our own environment but having a tt in the corner/behind a speaker is probably THE worst placement for a tt, especially on a high rack.

I have an inexpensive solution for you, get one more maple shelf just like you now have under your tt and place four appropriate load rated springs between the two maple shelves. If you have access to a drill press, recess the springs 1/8" into the upper & lower shelves. This step isn’t necessary but advised. Thank me later.

Look at my system page.

Also, make sure your two VTA tower screws are tight.

So I’m noticing that on the lead in grooves where there is no sound yet but the record is playing my woofer appears to “pump” exactly once on every revolution. Also the pumping is more pronounced at the beginning of the record vs the end. 
Could have to do with the edges of records being a bit more warped than closer to the hole, but that’s just a guess. 
Is this vertical movement of the arm to blame?  And if so what is the solution here?  I changed cart thinking it was related to compliance, but this cart pumps as much as the last cart, and the new Grado i. Using now is suggested by VPI. 

I could add some wt to the head shell. But when I did that Nagaoka it didn’t change anything.  But I still could try I suppose. 

I could try setting the TT on the ground but presents issues of its own. iC’s aren’t long enough. 
I can’t buy another cart, so that’s out.