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Have there been lots of boxs being returned due to this problem.? (NO)
You can not speak for all modded 1.6 boxes out there so I will disregard that.You don't even know how many of your modded boxes have packed in, namely the customer who had his box modded 6 months ago but does not return it when it goes wrong. If abox lasts above a few months the owner would not associate failure with the chip install anyway so may just replace or have the box fixed elsewhere (unless you give a 2 year no quibble warranty)
It does not matter to me what you do with your mods is your problem your descision. But to call this "Guess Work" shows your lack of understanding of how this has been checked.
The point about doing the mod causing damage does not hold water either. How many people wreck their boxes fitting the mod ?? Cutting the trace and installing the resistor is no more difficult than doing the LPC rebuild and mod anyway in fact when installing it takes an extra 30 seconds to do for a competent installer. the people who damage the box cutting should not be doing it anyway, besides which who are all these people do they PM you and tell you how they damaged there Xbox doing this??... didn't think so. So that is also pure speculation by you.
Hippo is right its easier for you to ignore the possibility but i hope this is not the last post in here if only to give people some info on this. This measure just to re-iterate is discretionary and only advisory no one is saying you have to hack your box to bits.