Just a quick check: when firing a missile launcher using a vertigo zond's BS Attack (Guided) rule, can I pick the AP+EXP hit mode, but still apply an impact template anyway thanks to the Guided portion of the BS Attack rule (p.45)?
You do not have a choice. You HAVE TO add Impact Template(Circular) to whatever weapon mode you choose to fire. So you get to choose between "AP+EXP DAM 14, ANTI-Material, Impact Template(Circular)" and "EXP DAM 14, Anti-Material, Impact Template(Circular)" for the guided shot with the missile launcher. Just saying because that Vertigo Zond firing a guided missile launcher shot is not using a precision weapon.