Did some tube rolling, any issues with spiral filaments in v5/v6?

[JSutter]

Spent some time swapping around tubes in my 6100LM. I really like the tone and feel with the current setup. Is there any issues with what tubes I have in any of the positions? I'm mainly concerned about the LPS Sovteks. I read all sorts about cathode follower circuits killing some tubes.
v1: Tung-Sol 12ax7
v2: Sovtek 12ax7wb
v3: Sovtek 12ax7wb
v4: Sovtek 12ax7wb
v5: Sovtek 12ax7lps
v6: Sovtek 12ax7lps
v7: Marshall ECC83

[Anitoli]

Time will tell. They will either hold up or die a quick death, but unlike a power tube dead pre-amp tubes don't usually damage anything else in the circuit. If you like the way it sounds with that configuration play it and see what happens.

[JSutter]

One of the LPS I've had for probably 10 years. It was in v2 for a few years. The other is brand new.

Which positions are cathode followers?

[Anitoli]

The cathode followers are V3, V4, V5, and V6.