Well, if we're copying from the equipment, does that just leave CL for the different constructs? I'd suggest using the same CLs for the juggernauts as in create guardian.
		
		
	 
Upon reflection, the spiritual equipment will have a number of differences - for a start, the spell only has a 1 round casting time so the pilot won't have the 
create guardian's hour casting time to install the equipment.
Some rephrasing might be in order.
How about this:
You may create less powerful juggernauts than your level would allow if    you  choose. The juggernaut is under the control of the pilot, not the    spell's caster, if these roles belong to separate creatures.
The pilot must ritually don a control focus during the casting time of the 
pilot juggernaut spell to establish a mystic link with the construct. This focus item usually takes the form of a mask shaped like the face of the construct.  During the casting process, the caster must stay within range of all the  components and targets of the 
pilot juggernaut spell, which includes the pilot.
After casting is completed, the totem animates as a guardian juggernaut    of the appropriate type under control of the pilot.  The juggernaut is    able to use any magical equipment in its spiritual equipment slots at    the direction of the pilot provided the pilot wields a replica equipment version of it (see the 
guardian  juggernaut    template for details).
The pilot and the spellcaster can freely access the juggernaut's spiritual equipment slots to insert and remove magical items. They can install equipment before the 
pilot juggernaut spell is cast or while the juggernaut is animated, and are also able to change equipment by replacing items in an equipment slot.
A guardian juggernaut created by this spell can be piloted until it is    destroyed or the spell's duration runs out. The pilot can direct the    juggernaut as long as the juggernaut is on the same plane and the  pilot wears the control focus. If the pilot is incapacitated  or  killed  the juggernaut becomes  inactive,  since it  only moves when its pilot acts. The juggernaut also  becomes  inactive if  the pilot takes off the control focus since this breaks the pilot's connection with the  juggernaut. The  pilot cannot resume control by putting the control focus back on. Recasting 
pilot juggernaut guardian    will "reset" the remaining duration of the spell to 1 minute per level and also    allows the caster to reassign the pilot – either appointing an  entirely   new pilot or reconnecting a pilot who's connection to the  juggernaut  was  broken.
A 
pilot juggernaut spell can’t be defeated by 
dispel magic or dismissed by its caster. It can be disjoined by 
mage's disjunction or broken by 
break enchantment* if such spells are cast on either the pilot or the juggernaut. 
Break enchantment automatically breaks a 
pilot juggernaut spell from the same spellcaster. *The 
pilot juggernaut spell is an exception to the rule that 
break enchantment only works against spells of 5th level or lower.
When the 
pilot juggernaut spell expires the guardian juggernaut reverts back to being whatever base construct it was created from.
At the DM's option, this spell may be used to pilot other varieties of construct such as a shield guardian or clay golem. The minimum caster level required to cast 
pilot juggernaut on such constructs is typically twice the Challenge Rating of the construct (i.e. CL 16th to operate a CR 8 Shield Guardian as a piloted juggernaut).
Material Component: [
Expensive incenses or body paints?]
Focus: A finely-crafted item of clothing (usually a mask) that resembles the base construct. It costs ??? gp.
Replica Equipment: These are wooden copies of items used with the    juggernaut's spiritual equipment ability, see the 
create guardian spell for more information.
	
		
	
	
		
		
			Well, if we're copying from the equipment, does  that just leave CL for the different constructs? I'd suggest using the  same CLs for the juggernauts as in create guardian.
		
		
	 
Works for me.
Updating 
Pilot Juggernaut Spell Working Draft.