Magus Spellstrike: Holding the weapon with both hands, and Critical hit Deck interaction

[Tomppa]

A few spellstrike questions I haven't been able to find answer, even after searching the forums thoroughly. The real question is wether or not you can use two hands with spells and spellstrike and spellcombat to get that 1.5x strenght bonus to damage (instead of single-handed 1x bonus).

1. Grabbing the weapon with -both hands- while holding the charge:
Does this dissipate the charge?
Example:
Round One: Cast Shocking grasp, move to enemy, use free attack and miss.
Round Two: As a free action, grab your sword with two hands, strike the enemy with your sword to deliver the spell through spellstrike.
(Reason would obviously be to deliver 1.5 str bonus as damage)
Is this possible?

2. Can you use spell combat to: Attack twice with your sword, wielding it with two hands, then letting go of it with one hand, cast a spell and deliver with the spell with the free attack (either using one or two hands on the weapon)?
If the answer to 1st question is "No", then two-handing the weapon is obviously a no - but how about the other option?

3. Critical hit deck: If I confirm a critical hit with a Spellstrike melee attack that delivers both weapon and spell damage, should I either draw two cards (one for swords damage and one for the spell) or just one and decide wether I should use the melee or magical result?

4. This actually concerns more the Critical Deck and less about the magus.
If I confirm a critical hit with a spell (say, through spellstrike), but the opponent makes the save (and it negates the whole spell) - should I still draw a card in case the critical hit inflicted other penalties? If the save only, say halves the damage of the spell, does it also reduce the critical effect to half?

[Mucronis]

1: That works as long as u cast the spell in a normal method,NOT spell Combat, see link in #2
Round 1, Standard action to cast SG,take a 5 feet move OR a normal Move, then deliver the SG (either by Touch, OR with a weapon, in 1 OR 2 handed grip) Miss.
Round 2: use a standard action for a Touch attack (per holding the charge rules for touch spells) OR attack with weapon and deliver with Spell STRIKE

2: Spell Combat states the Magus needs a free hand, (consensus is during the whole full round action, confirmed by Devs i think) so NO, no 2 handing in any way during Spell Combat (baring lvl dip in alchemist for extra hand disc, or other extra hands shennanigens) Paizo FAQ on the Magus

3: as the Crit and fumble Deck is an OPTIONAL rule, there is no RAW for it, personally, I'd say, weapon crit only if the crit is with a weapon, Spell crit if it is with a touch attack.

4: a Save that negates the spell would negate the crit aswell IMO.
Save for half dmg, and it is a crit, then total up you crit damage, and then he gets half dmg (What spell has an Attack roll AND a save for half dmg ? remember you can only crit on spells that needs an attack roll.)

Grick's wonderful and brilliant Guide to touch spells