CRUSADER KNIGHT TITAN!

I just finished figuring out the points for my Crusader Knight Titan.  I used the Vehicle Design Rules from Games Workshop's 2001 CHAPTER APPROVED publication (with inspiration from Forgeworld's Titan Rules, the Bell of Lost Souls Knight Titan Rules and the Dreamforge website).  Let me know what you think...

1. PICK TYPE:  Walker (0pts)
2. PICK SIZE:  War Machine (0pts)
3. PICK ARMOR:  F:14 (30pts) S:12 (2x20=40pts) R:11 (20pts) so... (30+40+20=90pts)
4. OPEN TOPPED OR FULLY ARMORED:  Fully Armored (0pts)
5. WORK OUT SPEED:  Agile (30pts)
6. PICK WEAPONS:  Vulcan Cannon {modified Heavy Bolter} Range = 54" S:6 AP:3 Heavy 3D3-3, Primary Weapon and AA Mount {allows the weapon to shoot at flyers using it's normal BS} (Heavy Bolter 20pts, Gatling Weapon +150%, Long Barrel +50%, Mega Weapon +150%, Slower Rate of Fire {-3 shots} -75%, and AA Mount +50% so... 20x4.25=85pts) Executioners Blade {Titan Close Combat Weapon} +3A, Destroyer and Primary Weapon (120pts) and Twin-Linked Heavy Bolter Range = 36" S:5 AP:4 Heavy 3 (Heavy Bolter 20pts, Twin-Linked +50% so... 20x1.5 = 30pts)
7. WORK OUT CHARACTERISTICS:  Adeptus Titanicus crew WS:4 BS:4 S:5 I:3 A:1(+3) (0pts)
8. PICK SPECIAL OPTIONS:  2 Imperial Void Shields (70pts), Orbital Lander (30pts) and Souped-Up Engine {War machines and walkers with souped-up engines always count as being agile and use that speed when figuring up the COST OF SPEED}
9. STRUCTURE POINTS: 2 (100pts)
10. WORK OUT POINTS COST: 90+30+85+120+30+70+30+100=555pts
11. WORK OUT VEHICLE CATEGORY:  Super Heavy Walker
12. NAME YOUR CREATION:  Crusader Knight Titan

ALL COMMENTS ARE GREATLY APPRECIATED!

(even Devil's Advocates)