I'll give you a tip Mark. There are a lot more titanium screws that you can replace. Any screw that is M3, countersunk or button head, you can replace with titanium ones. That includes some on the bottom of the chassis !

You also need to look at the front of the bumper / body post, especially the steering linkages and the servo mountings, screws mounting the tank and the upper deck, screws mounting the side braces, the rear shock tower etc.

My apologies, the 2.9 mm head self tapping screws can be replaced with M3 titanium ones. I know they fit because I'm using them.