I agree , leave it stock for the IVA.
There's no gr8 difference in the difficulty of fitting efi over carbs + Jolt. Ok you need a high preasure fuel pump. But other than that it's just a few extra wires.
The bike carbs will have to be jetted correctly and tuned idealy on a rolling road. And combine that with tuning the Jolt too..
The Squirt could be started on a base map and live mapped with a WBC on the "Private" road.
So although the cost of MS over MJ ~£300 if you included the extra cost of bodies over carbs. The tuning costs could well make the price a lot closer overall.
And if you move engines you just need to live map again.
But your also right, no point spending money on a 1.8CVH.
So..
Stick with the standard carb with the standard ESC-Hybrid ( which does the job very well ). and then throw in a firebeathing monster after the IVA and funds allow
TT