The spokes on the MPII, MPIII, MP4
and MP5 hubs all have the same paired holes, but the MPII had a slightly wider distance between the flanges.
A different flange spacing measurement can be manually entered to match your particular hub if necessary, but I would expect the default 22mm width to be close enough for most applications.
The idea behind the paired holes was to reduce the spoke angle at the rim to the angles typically found in conventionally spoked wheels:
This has greatly reduced the major problem that many hubmotors suffer from with spokes bending and snapping due to the nipple not seating correctly inside the rim:
Here you can see how badly the spokes were distorted on the original Magic Pie:
Magic Pie II, III, 4 and 5 hubs with laced rims all use the same paired hole measurements.
Using the
ebike.ca spoke calculator, select the "
Magic Pie 3" hub making sure the "
Cross Pattern" is set to "
0" and I suggest you also fit the spokes with the
elbows on the outside of the flanges for better lateral strength as shown here:
If you have an original Magic Pie with the longer crossed spokes, make sure the Paired Holes checkbox is left
blank and the Cross Pattern is set to "
1".
If you are fitting a new rim to a Magic Pie Edge or a Smart Pie, you would have to carefully measure the required parameters and then select the "
Custom Hub" and enter the custom measurements.
If your rim is not listed in the dropdown options, you will have to measure and then enter the correct
ERD:
I much prefer the spoke elbows on the outside of the flanges with the heads on the inside as shown here:
This also helps to alleviate flexing and fatigue of the unsupported spoke elbow at the flange attachment:
Alternatively, you can use spoke washers under the heads of the spokes to eliminate the gaps:
Which should hopefully prevent this from happening:
I also recommend using Sapim butted spokes if possible for additional strength and durability:
I hope this answers your original question and also helps with your spoke measurements and wheel assembly.
Alan 
