Hmm, I see what you mean. I have ordered a set of Thomastic Superflexibles from SAITENKATALOG.DE so I'll let you know how it goes.
My stand (replacement after the first one broke) lost its split pins too, so like you I've put a bolt through. It's worth noting to anyone who does this the stand top is a cast metal so don't over tighten the new bolt, you could break the casting. I think it might be worth the extra investment in a CR4 stand. A word of warning to UK owners though, don't try to buy a CR4 stand from The Bass Centre in London, because I didn't buy the WAV4 from them they would barely give me the time of day and couldn't put the phone down quick enough

, so I got a quote from Bob Gollihur. I'll have to see how the funds go.
BTW, after having done two gigs now I have radically altered the settings on the PX3B. I found the original settings, while sounding good to my ears at home, sounded way to boomy at the gig and didn't cut through at all. I also got a copy of Todd Phillips' Essential Techniques for Acoustic Bass and realised a 'real' upright is actually quite 'bright'. Here are my new settings, let me know what you think.
Tube1: +14, Low: +3, Mid: +14, High: -8, Presn: 0, Trim: -12, Gara1: 10
I turned the EQ.Trim down because I found some distortion when playing two note chords and the slight reverb gives it a livelier sound too. I've also raised the bridge height, and that changes the tone as well. I play with a quartet made up of myself, two electro-acoustic guitarists and a percussionist. We play Latin oriented material and the new settings sit much better than the earlier ones.
Mike