You cannot have the lense updated. The lense is made into the case of the shifters and they have to be destroyed to be taken apart. You can use ZR4 shifters with a ZR3 interface though. If you are interested in only purchasing the shifter units then please call our service department.
ZR3s have long been obsolete. The ZR4s have been our only shifters for about 3-4 years now. I'm not aware of a newer version being released soon but I also couldn't say anything if there was...
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