All the multiple fittings when stacked together tend to create flow restrictions where they join due to differing sizes of bores and passages. Although they are fairly pricy the fittings that use a formed tube are a better deal than a forged 90 degree adapter and a hose end. If you have room, use them you will enhace
oil flow and eliminate pressure drop. Check out the Earl's Plumbing line. For an FE suggest size 12. Or go to an Aeroquip dealer and get the hose ends crimped on, then they are more compact than reusable ends.