I can help you by video-chat, please sent a pm
Right now, I'm waiting on a Kryoflux that I ordered. It may take a little while to get here from the UK, but it seems like a much easier method, and I should be able to use my NOS disk drive with that without modifying. I live in a rural area of the USA, so finding someone to help me solder vintage electronics is a near impossibility.
@Bas, I was a bit confused about the email you sent me due to the translation. I'll reach out to you on whatsapp but I am nervous about attempting electronics repairs. I have no soldering skills and I don't think I could pick out the difference between a cap and a resistor in a line-up. I love technology and I've done a bit of programming in my life, but I never learned to repair electronics and the thought scares me!
I'm not giving up on this disk preservation though, even if I do have to take an alternate route to get there. I am, however, extremely nervous that the disk will be bad.
For the Sony HBF700 I used among others a Newtronics Co. Ltd, MITSUMI, D359T5.
Worked!