Knife sharpener - Wusthof whetstone

Custom made for my Wusthof whetstone (ref 704773), here is my sharpening device !
Inspired by some i found here, i made my own, according to my tastes and needs.

I purchased the stone online on knivesandtools (24€ + shipping) , very happy with it, but wanted to be more precise while sharpening my knives, so ... here it is.

Stone sizing : 150mm x 50mm x 24.5mm
Tube used : 10mm aluminium (pretty close to 3/8 inch)
Bolts used : M5 (and the nuts fits tightly, no need to glue them) and smal