Restored my dads R2R but no tape loop on integrated

My dad found his old Teac A-3300SX-2T in storage and I’m having it restored currently. I wanted to do some recording from my TT and eventually from a CD transport as well if I end up adding one. My integrated is a Cambridge Audio CXA81 with no tape loop (only a pre-out option).

Tape selector?

https://www.hifiengine.com/manual_library/sony/sb-500.shtml
https://www.hifiengine.com/manual_library/akai/ds-5.shtml

I found a few models like the Sony SB500 or Akai DS-5. My thought was to connect the Teac input/output to ‘Tape 1’, phono stage output to ‘Tape 2’ and output from ‘Source’ to a line input on my integrated. Would this introduce any type of feedback loop while recording?

This would save me from moving cables around but it also means that my TT signal is always passing through the switch even when listening to it directly. I’ve read that these older switches are prone to oxidization and require some cleaning usually as well as constant exercising of the switches.

I wouldn’t want to potentially degrade the sound quality of my primary listening source to allow recording to a R2R

Phonostage direct to R2R?

The other option would be connecting my phonostage output directly to the Teac whenever I want to record. But this would involve the hassle of swapping phonostage output from integrated to r2r and back. Also I would only be able to monitor the source using the headphone out on the Teac and the built in output selector switch.

Rethink CXA81?

Is there another option available outside of completely rethinking my choice of integrated amplifier? The R2R holds more sentimental value than anything so I feel like it would be silly to start swapping major components for an unexpected add-on.