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Thunderbird Club

Mines dead tight and dead level. The bridge anchors and body bolts are metric on the Eppi models and not on the Gibson models. You might have a situation where someone has replaced the metric bolts in your bridge with Gibson ones, thus the thread mismatch and bridge tilt.
Both of mine have the loose parts, the new 64 and the VP . The VP had very little play time on it, and the 64 was new.
Bad luck! Maybe.

I have many options to correct.
I’ll provide video later in the week of just how loose mine are.

It’s my OCD mostly :)
 
There is zero space between the bottom of the bolt head and the shoulder on the lower part of the nut. That is an optical artifact of the angle of the photo.
Rather I meant to state:
In your photo: that mating surface on mine has enough space to slide a business card in between.

In your photo, the visible “space” is the chamfer on the lower edge of the upper “cap” screw head.
 
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I have two SG Supreme basses with pickups in the Mudbucker positions but neither are true mudbuckers and neither have the booty of the Thundercaster. Which EBO years had the massive bottom end?
The ones built in the '60s and '70s.
I'm not sure about the very early ones with a black pickup, but any of the 60's/early70's EBO and EB3s with the pickup against the fingerboard will produce lots of sub bass. My wife rarely comments on the sound of any other bass, but she'll tell me various parts of the house were rattling - "you were playing the EBO weren't you?"
 
2 of my 3 basses went back to EBCF’s.
The 3rd to follow.
After trying numerous different others, and all had their strength and weaknesses.
The EBCF’s just work for me as the all purpose strings.

Of course all my pick up choices do not lack in the low end department.
I get that. You can EQ them for a wide range of sounds.
 
Both of mine have the loose parts, the new 64 and the VP . The VP had very little play time on it, and the 64 was new.
Bad luck! Maybe.

I have many options to correct.
I’ll provide video later in the week of just how loose mine are.

It’s my OCD mostly :)
On my VP, I can see a gap between the top edge of the slot in the post and the bridge. Once the string tension is on, the bridge can't move up, or in any other direction. It doesn't appear to be leaning.
 
On my VP, I can see a gap between the top edge of the slot in the post and the bridge. Once the string tension is on, the bridge can't move up, or in any other direction. It doesn't appear to be leaning.
There has to be some small gap or the bridge slot wouldn’t go into the bolt. The question is that is normal and what is out of spec.
 
2 of my 3 basses went back to EBCF’s.
The 3rd to follow.
After trying numerous different others, and all had their strength and weaknesses.
The EBCF’s just work for me as the all purpose strings.

Of course all my pick up choices do not lack in the low end department.
EBCFs are on all my basses - IV, CP, VP, 64, 2xGreco. I have a couple of other sets that came with basses or were given me. I suppose at some point I'll try them on something just to see, but whenever I think about doing that, I end up playing instead.