Tips are more than welcome

How come?
Just don't if you don't need to, 45°'s don't add very much restriction to the loop individually, and no where near as much as 90°'s and I am not saying don't use them if they are needed, definitely use them if they solve a kink issue. But your rad benefits from being plugged into a high flow loop with as little restriction as possible.
I could be wrong but they "look" like
1/4" Thread Rotary 45 Degrees Adaptor with 1/4" Inner Thread : Silver made by Phobya, sold as own brand by many shops.
Of which I bought quite a few a while back. Sitting in my box of bits now.
IMHO they are one more thing to go wrong/leak, I'll be bold and suggest you should have got 45° all in one rotary fittings for when you need them but you've got these now and you may be perfectly fine, just use them sparingly is my advice.
I'm not one who is a fittings snob, I'm not actually a fan of Bitspower and think they are a bit of a ripoff when it comes to fittings, and of the parts I have had leak over the years bitspower has been more than others. But I always go by the less is more adage with fittings, the less "bits" there are the less chance there is of something failing or not being quite tightened up enough or ... anyway enough of my ranting
