Tone arm holes do not line up - best way to attach TT?

What do you mean? Your arm has VTA on the fly. Are you talking azimuth? Or...? Because if not what else is there?? 
Please note the very first thing I said was to make sure you have correct spindle to arm distance.

you are going to have one shot at the hoop with tape, there is no second chance at proper location. think about some sort of guide pins to get it exactly right the very first time.

So you took off a 9" or 10" and you’re installing a 12".

6" to the right? That is what you posted. Your setup is for a shorter arm?

If I’m hearing what your saying... Did I miss something?

I have to move close to 4" to the right. Changing from a 9 to a 12 on a TD124. I have to go outside the chassis to mount it. You aught to see it with a 16". Really!

Regards

The tonearm must be mounted so that it has a fixed relationship between the TT spindle and the the tonearm pivot and that relationship should be very ridged. Any movement between the two points will be read as a signal being generated in the cartridge causing a blurring of the music. Remember, there is a lot of vibration being fed into the cartridge, It travels up into the tonearm. You don't want the tonearm vibrating around. It should be held secure.

BillWojo

This is the Hanss T-30 HANSS ACOUSTICS T-30 (hanss-acoustics.com). From a casual view, your Reed 3P 12" tonearm is probably not going to fit on that turntable. Each turntable has allowable tonearm lengths that will work. Send Hanss and e-mail and ask them what is the longest tonearm pivot to spindle that will fit. If what they tell indicates that your Reed 3P 12" is not going to fit you have some options:

-return the Reed and get one that is a shorter length.
-have a plate machined to cantilever from the existing tonearm base to allow mounting the 12" Reed.
-buy a separate tonearm pod to allow using the Reed 12".