Don't be overly worried. I wash my VX regularly and I spray the front good including the grill opening and the two openings in the cladding below it. I've also been underneath it spraying around with no ill effects. I have carefully sprayed inside the engine bay from the top. Without using a lot of pressure all of that should be fine.

Apparently some VXs will not have the problem anyway and it's just one of those hit or miss sort of things. At the meet we actually submerged the VX's up to about the headlights, and we hit the water with some momentum so the water came up through the cladding and so forth with some good force. It was kinda fun and great to see what you can get through in a VX, but it's not something I'd do again - the alternator concern being one reason, (luckily with an extended warranty that only ran me a $100 deductible and the dealer didn't say a word about all the grit and grime on the undercarriage) and the intensive clean-up being another. :-) After the meet I did find evidence that water spray had entered the air filter box but didn't get further than the bottom of that. And there is STILL some of that clay that washes out of places from time to time to this day (meet was last October). I'm guilty of it, but getting in deep water just isn't a real good idea.