Selector rod, sticking in neutral and jumping out of gear back to neutral

[Fazerider]

What problems do you get with second and sixth? Did you end up filing the end of the tab off?

They just fail to engage if my gearchange is particularly hamfisted. Bear in mind that second gear suffered a lot of this as the fault started to develop and before I fathomed out what the main cause was (hence the state of the selector forks/drum). If you've not had many horrible graunched upshifts the dogs are probably still in useable condition.
I'd certainly recommend grinding the tip of the tang down as described: don't bother attempting to bend or file it, the metal's too brittle and hard. It's a job that only takes a couple of hours and if it doesn't solve the problem completely a change of drum and forks probably will.