A couple of posts with several pictures.
First picture is of the single inner screw on the end of the island closest to the coffee bar. The second picture is of the double screws holding the register in place which I assume go through to the inner box frame. The third picture is the block of 1x3 I added. The fourth picture was taking lying on the floor on the door side of the island with the camera facing up between inner and outer boxes at the point separating the dishwasher side from the sink side and showing the factory reinforcement there. The last picture, I snuck the camera between the boxes on the oven side of the island to take a snap of the factory reinforcements from underneath the false bottom and showing the same factory reinforcement of picture 4 from the inside of the island (basically other side of Picture
#4 . Notice the staples in picture
#4 . They attach a 1x3 (picture 5) which appears to provide something to screw trim pieces into which the island flooring is screwed into. I've tried to label the parts but near as I can tell the supporting cross frames are only stapled to the inner box frame underneath the separating walls on either side of the sink area. In Picture 4,
A are just the supporting 1/2" or 3/4" strips that support the floor where the dishwasher would go.
B is the supporting strip which the under sink luan floor is attached to.
C is the luan wall separating the dishwasher and under sink areas.
I'll follow up next post with the drawer side.
View attachment 46309
View attachment 46310
View attachment 46311
View attachment 46314
View attachment 46313