Sounds like your .010's are actually .020's. .010's only had plastic tanks, red for original, black for the later re-release. The PeeWee .020 did have a red anodized tank (and also plain aluminum depending on era), and the TD .020 has a red plastic tank.
Here is a website with a wealth of historical info and images of Cox engines: http://www.mh-aerotools.de/airfoils/cox_frameset.htm
I like the idea of the .09 on a Mach None. A TD .049 does fly them "fine", but one man's fine might be another man's "dang, it needs more power". The Cox standard prop for the .09 is the 7x3.5, so a 7x3 is a good choice for medium speeds and lots of pull, whereas a 7x4 may pull the rpm down a bit from where you want it. For a 1/2A size model a 6x4 should be a great choice, not sure of the vertical as compared to the 7x3. Try 'em both.
The website above should have power curves for all. You'll see where max power is developed on these, and don't hesitate to run them there so long as you use decent fuel with oil percent 20-23% and plenty of that castor. Don't bog them down with too much prop.