Timing Belt Snapped

[dsp26]

OK i'm going to recap

1) Built engine
2) Belt snaps 5000KMs later
3) Put back together


Setup is exactly the same EXCEPT the following changes from Step 1 to 3...

- Idle Fuel Pressure (Vacuum line on) from 40psi to 34psi
- Dizzy timing from 14* now retarded ALL THE WAY?!?!
- All valves replaced
- Valve seats cut again (Again)
- cyl compression went down from 230psi to 200psi

Now ive seen 2 engines lose power before from having the valve sinking in the seat (a 4age20v and sr20) and i was discounting that memory until recently 2 separate people/workshops reminded me that B-series engines make power in the head and that a sunk seat will lose power... my valve seats were reseated twice and chances are its beyond the Honda limit of 10 thou...

So tell me is the below powerband loss a result of valve seating? Plus the fact that dizzy timing had to be retarded aaaaaaalllll the way....
i'm losing my patience. Had i known this was going to happen I would have just sourced a head from here....

These are the justifications i was given:
*230psi to 200psi cyl pressure drop
- Non oem valve replacements.. "may have a bit more of a dish"...
- Fair enough but 30psi is ****ing huge

* Valves sinking in seat
- "Had to be done"
- Which is fair enough... but Honda specs limit it to 0.010" otherwise needs to get re-seated. and that minute amount won't look "sunk in"

* Different powerband on second pic)
- "The manifoldand throttlebody you put on isn't designed for it, if you take it off you get it (power) back"
- OK I did that.. made less power... was 91wkw but the curve changed back to how it was

Now i'm not ****ing stupid... i'm getting irritated because:
- I refuse to believe a reputable workshop would try to justify these as so...
- "tinkering" the dizzy and fpr to gain 2wkw additional peak doesn't equal the 5-8wkw i've lost from 2000-7000rpm.... and the fact the dizzy had to be retarded all the way is a ****ing huge diference.