UPDATE: I've added a 2nd version of this caddy, which I made following some feedback in the comments section. This one sits more securely without needing double sided tape, which is often affected by the heat of the machine. It is basically now mounted upside down - please have a look at the models and decide which one will suit you better.

Remixed from the original design which had better support and strength than some of the others, customised to better suit my tools. Allows scraper to be quickly removed.

(This will cover one of your handle holes completely)

Fits:

1x scraper
1x digital caliper
1x scalpel
1x wire brush
1x torch
1x long nose pliers
1x side cutters
3x allen keys

1x storage pocket for a collection of smaller items

Print top side down on a raft with full supports. Print was around 5hrs at 30% for me.

Once printed, use a small piece of double sided tape on each surface that pushes against the printer, make sure you clean the printer with some metho or similar first and perhaps consider leaving it for a while before loading it up with weight.

This caddy will not fall off (it's impossible), but does rely on the tape to keep it flat, as it's got a fair amount of weight on it.