Unless there's better ways...
In your 'My Home' there's a 'Favourite topics' you can save threads you want to check back on...
Also anytime you click on your own or other's user names in existing threads by clicking on the bottom 'Show all user's posts' box shows that user's past postings..
So if you save at least one thread you've posted on in your Home 'Favourite topics' you can always click on it then your own user name then the 'Show all user's posts' box to show your past postings..
Again if there's better ways...
~ Pete
PS - How's your '60 Chevy fit so tight to the shop roof?.