Is this what you want???

alias viewmodeltoggle "viewmodelon"
alias viewmodelon "viewmodel_fov 101;r_drawviewmodel 1;alias viewmodeltoggle viewmodeloff"
alias viewmodeloff "viewmodel_fov 0;r_drawviewmodel 0;alias viewmodeltoggle viewmodelon"
bind "[key]" "viewmodeltoggle"

I know you can set viewmodels on/off for slots but not based on weapon. (i.e models on for original but not on the cowmangler).
Unless you have a different cfg.

As far as I know, you cannot change whether you can see viewmodels based on different weapons. However, you can use a viewmodel toggle.

Something along the lines of
bind "[key]" "incrementvar r_drawviewmodel 0 1 1"
in your config.

put: bind mouse2 +attack2 on classes that say ubered when you press m2.
for your medic, make sure you bind mouse2 to whatever alias is your text bind.

not every1 lives in the us.
gr8 hud btw

shud wurk

alias classswitch "class1"
alias class1 "join_class pyro; alias classswitch class2"
alias class2 "join_class soldier; alias classswitch class1"
bind "[key]" "classswitch"

Alternatively, you can bind your keypad (if you have one and not in use for other binds) to different classes.

bind "KP_END" "join_class scout"
bind "KP_DOWNARROW" "join_class soldier"
bind "KP_PGDN" "join_class pyro"
bind "KP_LEFTARROW" "join_class demoman"
bind "KP_5" "join_class heavyweapons"
bind "KP_RIGHTARROW" "join_class engineer"
bind "KP_HOME" "join_class medic"
bind "KP_UPARROW" "join_class sniper"
bind "KP_PGUP" "join_class spy"

mge for it

are you putting the script i posted in your autoexec or whatever and execing it in game??
if you are, then try binding it to a keyboard button and making sure it's not your mouse.
also make sure u dont have mouse5 rebounded anywhere in ur cfgs

alias +scope "sensitivity 1"
alias -scope "sensitivity 4"
bind mouse5 +scope

works 4 me