Ide,
Re. Twin injector:
I fitted one to my previous bike (a SV650). It's only designed for flat swing arms, and doesn't come with fitments for a curved unit. I spoke to Scotoiler helpline which is very good. They suggested users could fabricate a packing block, which I agree is possible if someone has the time and tools.
Re. Virtue of a chain oiler.
I totally agree. Scottoilers are designed to flow lighter oil onto the chain and wash dirt off. Chain grease, on the other hand, is designed to catch grit and turn into a grinding paste! Any bike with one set up properly should have a very clean chain, which many testify, will last much longer than one which has the hassle of being cleaned every few weeks.
That said, a periodic clean is still worth while, but even that is easier, and only requires running the chain through a rag with some Scottoil on it.
True, their is some fling of the lighter oil. But I have black wheels so not very noticeable, and if drop rate is set right fling is minimal.
But each to their own. There are certainly pros & cons...