Hi Tim. Most of your question has been answered in the other post you made.

The intonation length will always be a bit longer than the nominal (nut to 12th fret x 2) scale length as strings have a small length at each end that doesn't really vibrate. The thicker the string, the longer than length is, so the longer the overall string length needs to be to have a full vibrating scale length section. The G string on a 4-string bass will have the saddle furthest forwards because of this, but this will still be a couple of mm longer or so than the nominal scale length. The D saddle will be a bit further back, the A a bit further than that and the low e will have the saddle furthest back from the nut. This is why the E and A saddles have the shorter intonation screws.

You've got a long intonation screw length on ths D and G saddles, so you don't want the saddles too far towards the rear of the bridge when measuring, otherwise with the saddles right back, the intonation screws will be sticking in the air and catching the palm of your hand. Also, the springs can get really compressed and make it impossible to move the saddles back further.

So I normally recommend moving the G saddle forward so there's about 3mm of thread showing in front of the saddle, them measuring the scale length from the front of the nut by the G string slot. to the middle of the G saddle (with the bridge already centred correctly). That should give you a good bridge position. The saddle will almost certainly have to be moved back a bit once you've got all the strings on and you are checking intonation, but that will be an easy task.