Best Equipment to put on tanks

It's a bonus weekend and they're at -50%, but choices choices XD Each of my tanks has camouflage net. I'm specifically thinking about what to put on next on my IS, spall liner or telescope or is there another even better one?

Gun Rammer is always a good choice IMO.  🙂

mmmm I would go for
Rammer, Defo
Vents and Bino's  🙂