The little hex screws to hold in things like this hub carrierhttp://www.redcatracing.com/RC-Cars/Redcat-Parts/02013(you can see two of these screws with this kit)
do not fit the aluminum upgrades of the same part. Can anyone please tell or better yet, place a link to the hex screw that fits these aluminum upgrade parts?

This is the upgrade part which did not come with any hex screws to hold in the bottom bar.

<a href="http://www.redcatracing.com/RC-Cars/Redcat-Parts/102012">http://www.redcatracing.com/RC-Cars/Redcat-Parts/102012
</a>
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<div>It says at the bottom of the page:</div><div><span style="font-family: Arial, Helvetica, sans-serif; line-height: 16px; ">
</span></div><div><span style="font-family: Arial, Helvetica, sans-serif; line-height: 16px; ">"Requires 02098 to complete installation"</span></div><div></div>http://www.redcatracing.com/RC-Cars/Redcat-Parts/02098<div></div><div></div>

I see that now, thanks, I'll put it on my next order<div>
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You can go to home depot and get some set screws that fit.

Would you happen to know what thread to look for at Home Depot?<div>
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I think a M3*3 Grub screw doesnt come in different threads. But I could be wrong. If there is different threads then it would be fine or course threads. Those screws go it to aluminium so they would be fine thread. Course thread screws in rc cars go it to plastic. </p>

Yes, because the grub screws from the old one don't fit the new one.

I order all my screws from http://www.tonysscrews.com/ unless i really need them. its usually cheaper than me driving 1/2 a hour in my ford expedition to get them (it gets about 15mpg). plus those little screws are like .20 each, i can order them online for like 1.50 for 20 (i order a bunch at once . plus they are super strong screws,
I ordered a bunch from fastenal all the highest grade available and the heads all strip super easy. tonys screws are much better plus you get a neat sticker that says i got screwed by tonys screws

Thats correct ther is not a different thread just take a grub screw with you and use the different holders untill it screws in and that will be the size that you will need.