Quoted from billsfanmd:
Jam. Thx. I looked at your pic on post 1223 that is where I am moving the Opto bracket. But there is no hole for the receiver Opto. Isn't this Opto bracket on all wh20 ? Don't think my ramp has Optos.
I think you may have an early production White Water. One way to tell is to look at the upper playfield just to the right of (behind) the upper flipper. If it's yellow there, instead of blue, you have an early production game. One difference between the early production games and the later production games is how that opto at the switch behind Bigfoot is set up.
On the early production games, the optos were attached to the ramp as shown on the ramp to the right in post 1212 (page 25) of this thread. The later production-style ramp is shown on the left in that same picture (note the lack of optos attached to the ramp on the left). The later production models also have cut-outs in the ball guides behind bigfoot to allow for the updated opto placement so the beam can pass through. The early production models don't have these cutouts so the opto won't work in that spot.
So here's the thing, the reproduction ramps that you can buy for White Water are all modeled after the later-production (no opto) style ramp. My bet is that you have an early production model White Water. Somebody replaced the original ramp (with the optos attached) with the later-style reproduction ramp (no tabs to attach the optos). In doing so they no longer had a way to mount those optos in the original configuration. Therefore, they got a bracket from the later style model and put it in that unorthodox spot because it won't work on your model in the regular spot.
I think you have a few options. If the optos are working in that spot, you can leave them there. If you want to keep the game more original you can fashion a way to attach the optos to the reproduction ramp in a similar way to how they are shown in post 1212 (page 25). Or, you can try to tack down some of the new-style ball guides with the cutout for the opto beam and replace your original ones with those. The ball guides may be tough to find.
I'm not sure whether the placement of the opto before the VUK kickout on the early production models (instead of after the VUK kickout on the later models) is of any consequence. It's possible that later software relies on the opto being after the VUK but I've never heard of anyone saying that's a problem.