Interesting. I ordered Philips HIR bulbs but I imagine they would have the same issue? Would you happen to have a photo or schematic that shows the region that has to be modified?
I have read some scuttle about Philips not being true HIR. I would think it should be pretty apparent from just looking at them. I've been using Osram HIR bulbs in flashlight mods for years and they have this characteristic "gold dust" appearance inside the capsule
I'll tell you, the thing that does give me pause is the comment that this mod is fine for projector but not reflector type installs. Trying to wrap my head around why that might be.