wing plates on Etec

I did put this out on the Technical discussion but the question wandered off track a bit.
I am really looking for some input from someone who has fitted Wing plates to
Evinrude 300 etecs I think the midsection / lower cowling is the same as the 250
looking to see if anyone has done that and how involved the alteration is to the cowling r:e small cut out or a slot to pass it through or round the cowlings .
Fairly sure the part number from Imco is WP-25 LR that's the one listed for the 250
just waiting for them to confirm its universal to the 300
Any input is appreciated.

...the answer you seek, is within imco grasshopper...

Wise words master but the answer I sought layeth with Latham Marine. They sent me pdf for the fitting instruction for their versions, that fits the Etecs . And their phone number !!! my mistake it was the price