Earlier today I have tested 3 TK11s. In all of them I have found a doughnut shape close-up beam (at 2 feet or closer) of varying degree. Of course the doughnut centred in at longer distances and the doughnut disappeared and became a centre spot. I did not buy the TK11s. Please tell me if any of you have the same experience. Could this be due to the construction of the reflector cone? Or could it be sample differences only?