Fitting the sump baffle

Sump baffle arrived from Extreme Engines today.  I put the engine back on the stand and turned upside down to remove all the sump bolts and then gently tap the sump until it became loose.  Also removed the oil strainer.

Attempted to fit the baffle but couldn’t get it to sit right.  One of the ribs in the engine appeared to clash so I notched out for it in the baffle with the angle grinder.

Still couldn’t get it to fit.  Also not sure what to do about the o ring for the oil strainer…… which side of the baffle should it sit on?  I will have to email extreme engines for more info.