hey there Jonpall.. I like your U2. Especially your lower register singing a lot.. focus on vowels, they're not all centered yet (trust me, I can relate). .. and in the chorus.. ..shorten the consonants and focus on how the focal point in your hard pallet shift as it's moving to the upper notes. Those are upper register notes (B4-F#4 me thinks)...and you're pushing them into the front registers a bit. Twang is great for keeping the pitch from falling back, however it also doesn't prevent the pitch from moving forward.. I think you could have a warmer sound in your upper voice. In fact, I hear a sweet tenor sound... ala early Carerras. (and that's a wonderful thing)
The fact is you have B4's is awesome...... Gigli only had a B4 and he is renowned for his voice (one of the greats).
FWIW stay away from Melissa Cross. Just ignore her. A dvd will never be a substitute for a trained set of ears.
Don't worry about weight, power, or any of that stuff.. feel the energy of the lower note ascend to the upper. The warmth comes from balancing the pitch.. here.. check out Bjorling's Ingemisco...
This is arguably the greatest tenor of the past century.. and he's singing a real bastard of a piece. Bjorlings balance throughout his range allowed him to have 'One Vocal' sound throughout his range. That gave him unbelievable freedom.
The center of vibration is going to shift more towards the mask as well as move a bit higher.. that's normal.. completely and totally normal. However, it will maintain more of the consistency with your lower register...
In all honestly, you're not using a good chunk of your voice, and you'd have a good bit more resonance and a sweeter sound once you get that balance hooked up. It will get more resonant and have more shimmer (due to the overtones).
Granted, you're not singing opera, however.. the same rules apply. You have a wonderful voice, and you could have a lot of fun with it. However, if you're not balanced in the upper register, then your passagio is also unbalanced.... over time....the things that unbalance the voice may damage it if you sing a lot.
But nice job.. take care of your voice. You've got a sweet instrument there, and it's truly a gift.
I'd recommend finding a good teacher in the area... and by a good teacher.. find one that's familiar with the tenor voice and has had proven success in training them. Work through your passagio with them. The key to the upper register lies in safely navigating the passagio.
But good luck!
ps... stay away from grit as much as you can.. no offense to anyone.. using it as an 'effect', or in the studio..is common... but minimize its usage in the live arenas. It's a cool effect when used in moderation, but dangerous if used too much.