I had inquired in a previous thread about quality levels of bearings for the BB30 and someone mentioned to me to look into the ABEC 5 standard as replacements rather than the ABEC 1 which Felt did the build with.
Through the shop a set of the 1 bearings cost less than $30. The 5 bearings and adapter COST over $100 sold as a bike specific bearing. I note looking online that ABEC 5 bearings can cost as low as $10 or so ea. from a bulk supplier (like Dixie Bearing).
So, question is what size are the bearings in the BB30, and is there something special about the housing or the bearing as "bike specific" that would justify this more than considerable price difference?

My thoughts were to remove the 1, take it to the supply house and purchase the "better" bearing from them for a few dollars and save myself a good amount of cash for the better bearings. The only issue that I see is the lack of the supplied retainer clip, but I don't see any reason I could not re-use the one in the BB now.
Is there something I may not know that would prevent this as a possibility?

It's usually cheaper to get good quality industrial bearings than bicycle specific bearings, and the bearings are often better too.

A higher ABEC means tighter tolerances. But that may not mean less drag, higher quality seals, or longer life.

BB30s usually use 6806 bearings.

The ABEC rating is used only in the US and has no meaning for bearings that are not rated/ sold in the US. Therefore I wouldn't really bother with the ABEC ratings for now. This is especially true for the usage of these bearings in bicycles. The beauty of BB30 is that the bearings are generic off the shelf bearing sizes. The bearing number is #6806. You can reuse the circlip, just purchase new bearings and replace.