Not wanting to shoot you down so bluntly after reading my previous comment , i want to make it clear that i am Diy myself and use L5 also , had the same one for 7 years i think , ok you had it fitted for you , maybe you couldnt do it yourself , some cant .
But for £3200 you should have at the very least stacking reels similar to Purefreedom , not 2 clovers cobbled together with 10mm nuts and bolts , also boilers with flues and roof vents , my only other concern is the distance of left boiler to van seat , could be angle of photo not sure .
Rich