The "adapters" are fine imo - the only reason for the specific 4 bolt soles is to slightly lower the stack height further.
If you don't need it then I wouldn't bother. The 3-4 bolt adapters are actually more adjustable, especially if combined with the fore-aft adapter, you can get the cleats much further back (semi-midfoot) on some shoes.
The "adapters" are fine imo - the only reason for the specific 4 bolt soles is to slightly lower the stack height further.
If you don't need it then I wouldn't bother. The 3-4 bolt adapters are actually more adjustable, especially if combined with the fore-aft adapter, you can get the cleats much further back (semi-midfoot) on some shoes.
That said - I do like my Ergo 3 SPs.....