Has anyone successfully used the USCartool A500 Crossmember?

Hopefully, it's just a fluid issue. are you using a mini starter?
Yes, the problem I've had is the small post where the trigger wire connects, the post actually turns in the case when you're trying to take the nut off, and it breaks this little wire inside, I've tried re soldering it twice, but it's down inside the case a bit and hard to reach, so my soldering attempts have failed twice now. So just going to replace it.