I'VE DONE IT!!!!!!!!
It was sooooo simple. Took me all of 15 mins. I'm even writing a guide and posting it here and on amazon's review.
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Hello all,
When I first saw the MX3100, I was in love! Mainly the reason was that it came with the MX1000(which i have already reviewed under that product). When I was looking for the best price, I came to realize that I was not prepare to shell out $100 for one keyboard and one mouse.
I researched more and found that the keyboard in the MX3100 package is exactly the same, albet the color, as the one in LX700 package. LX700 was so much cheaper too. Utimately, I decided to purchase the LX700 and the MX1000 individually thinking I could end up with an extra mouse from the LX700 package, which is the Cordless Click! Plus Rechargable. This is a not so good mouse by itself but if it's free... I'll take it.
So the project became how to integrate these two together using a single reciever. Logitech FAQs offer a solution: Use the LX700 as the reciever but you must use the MX1000 charging cradle by itself. Therefore I would have had two stations sitting on my desk making me look like a fool. Well the beauty of technology is, many times not all things are always new and improved. The reciever in LX700 actually reads the MX1000 mouse signal perfectly as if they were long lost brothers born in the same village but raised by different parents.
To clarify, the problem is that the charging station housing were physically incompatible with each other. Secondly, the voltages being charged were different between the two mice and that I would not get a complete charge if I used the MX1000 mouse on the LX700 cradle.
The solution was to swap out the integrated circuit board from LX700 to MX1000's charging station. In another words, the LX700's brain with the MX1000's body, making myself a perfect woman. There are two screws hidden by the logitech sticker on the bottom of the craddles. Unscrew them(takes a bit of strenght) and you'll find that the top and bottom half of the craddle easily come apart. The bottom circuit board is in fact the receiever. The charging circuit board was a separate entity from the receiver so it was really easy to separate. When i was swapping these two boards, I noticed that the bottom housing was exactly the same. So you could just easily take the top and bottom apart and swap those. There is nothing that is really holding these circuit boards into place, it's just a plastic fit. So after you've swapped these, just close up the unit and tighten the screws.
Now I have the LX700's bottom(brain = receiver) with the MX1000's top(body = housing + charger), that obviously fits the MX1000 so well. This whole experiment took only 15 minutes at most.
The MX3100 and the LX700's craddles both come with lights that indicate the keyboard button locks such as CAP, Func key, Num, and scroll. By switching these two units, the LEDs that showed these were part of the receiver, hence the lights were retained. THe housings were partly transparent. The only thing is that there's no picture telling me what these lights mean.
$52 - MX1000
+ $40(after rebate) - LX700
= $92
which gives me exactly what this MX3100 consist of AND I get an extra cordless optical mouse.