Skuttle has the same auto-attack damage as bedbug/tumbleweed has self-d damage.
Skuttle self-d does 1110 damage to comms: https://github.com/beyond-all-reason/Beyond-All-Reason/blob/3ac828b30ca7e6b00fe3725454ea020fae8fae9c/weapons/corsktlSelfd.lua#L18
Tumbleweed/Bedbug self-d + Skuttle auto-attack does 1390 damage to comms: https://github.com/beyond-all-reason/Beyond-All-Reason/blob/3ac828b30ca7e6b00fe3725454ea020fae8fae9c/weapons/crawl_blast.lua#L39
This is quite strange to me. I think that Skuttle self-d should at least deal as much damage to comms as the auto-attack.
Unit sources:
Skuttle: https://github.com/beyond-all-reason/Beyond-All-Reason/blob/master/units/CorBots/T2/corsktl.lua
Bedbug: https://github.com/beyond-all-reason/Beyond-All-Reason/blob/master/units/CorBots/T2/corroach.lua
Tumbleweed: https://github.com/beyond-all-reason/Beyond-All-Reason/blob/master/units/ArmBots/T2/armvader.lua