Nope I can't say that I did. The best thing I like about the ACOG's is that they are never "off". The LMT was my first AR and I paid a premium for it but as I learned more about AR's I decided to build my own that was more specifically what I would have gotten when I bought the LMT if I knew then what I know now. Now I have all the tools I need to work on the AR and the knowledge to put one together from scratch. The LMT wasn't getting much love now that I have the other one so I traded it a short time ago for the M1 Carbine I have. I know full well that the dollar value of the LMT was higher than the carbine and it certainly fed more reliably but I wanted a period Carbine in my collection and I am at an age now that what matters most to me isn't necessarily always based on dollar values.
This is the ACOG on LMT:
I will say that LMT does make one fine and very accurate rifle... but then when yu pay that kind of money you expect that level of quality too. The same goes with the ACOG's and the Leupolds. Strangely the ACOG was far more important for me to keep than the LMT was. I guess because I can build another AR piece by piece but I would have to pay for a new ACOG all in one shot.
All that being said there are even a few things I might change on the one I built now were I to do it again. Although not necessarily drastic design changes but more specific product. Most notably the front rail.