Conversion of a Slaters Gloucester 5 Plank Open into a Midland Railways ex WD Locker Wagon

Help,  I’ve become a bolt counter…..
During the last two trips up north while waiting for underframe parts from Parkside for the NBR wagons I made a start on a conversion of a Slaters Gloucester 5 Plank open to this –
Midland-WD wagon
This is a scan of part a page from Essery’s Midland Wagons Vol one and copyright in the book is attributed to British Rail. Shown her purely to illustrate what I am attempting to replicate.
Next is a shot of the Slaters Gloucester 5 Plank side, end and solebars so that you can see what I needed to change to get to where I wanted to be…
Slaters original Gloucester 5 Plank parts. Midland-WD Locker wagon Midland-WD Locker wagon Midland-WD Locker wagon