Dear VBits Studios,
Glad to get your message.
1. No, because the water block for 3080 ti FTW3 is large too. We have this water block BP-VG3090EVFTW at the following link. Or you can exchange the link to our 90 degrees one (BP-VGAMDLAC-A2).
https://shop.bitspower.com/index.php?route=product/product&product_id=7966&search=3090
https://shop.bitspower.com/index.php?route=product/product&path=67_102_201&product_id=7223
2. Yes, the distro plate allows to add extra fittings for GPU.
3. Yes, you can add another radiator on the bottom or side.
If you need more information, feel free to send an email to follows address,
We will send some photos of the three radiators to you.
shopservice@bitspower.com.tw