do you re-arrange your models every now and then ?

With the predominance of mine being in the 1:24th scale, and seeing very little new model issues I do not rearrange. With any new 1:43rd, I just find room for the newbies.

....only if I need room for additional models.    😉 

Most no but select groups periodically.

Occasionally, when I get a new car and realize I could group it with others in my collection, I do some rearranging.

Generally once a year I'll mix it up.😁

@perrone1 Me too Tony.

I just did a minor rearranging of my 1/43 models but more looms as the models flood in.

I don't rearrange them on any particular schedule, but at times when I'm relaxing in my car room, I do.  I'll notice two cars that my eyes decide would look better together and I will make the attempt to move them.  Then, in order to move those two cars, I've got to move six others to get to the two I want to get move, and it turns to a production.  Obviously frustrating, but absolutely the most FUN "frustrating" I can do.  Now all this said, I do DUST my shelves and the cases my cars are in on a weekly basis, so that too, sometimes constitutes a little rearranging.  All in all, I do pay a lot of attention to my cars realizing every day that I love them!  

I usually rearrange when something new arrives.  Right now I definitely need another wall case.  Things are getting a bit crowded around here!

Occasionally I also will rearrange models, usually in the display case over my desk. That's where a new model usually goes. Then I have to find a new location for the displaced model. At this stage of my collecting, that happens only once or twice a year.

I moved from Canada to the USA 3-1/2 years ago.  A few of my diecast display cases were damaged during the move.  It has taken me some time to find a vendor to custom make my display cases to match all my other display cases.  Today, just got word my replacement display cases are finished and I am excited.  Finally, after more than three years I can finish putting all my diecast cars on display.  I group my cars based on brand (T-Birds, Cadillacs, etc.) and some based on years of body styles (Chey's, Corvettes, etc.).  Now that I will have my new / replaced display cases, it is going to take me awhile to group my car collection.  I am just thrilled, finally I will get all my diecast cars displayed.

All mine are grouped by diecast maker, then I start at the lowest year to the highest year in alphabetical order.  So I only move them around if I purchase something that I do not currently have to get it in it's proper location.