No, not a bit of it.
Having said that, wannabe mechanics messing with injection systems and glowplugs etc are a thing of joy and future income to professional mechanics.
Seeing as you appear to be someone who likes a fight and putting words in people's mouths, here it is straight.
The wannabe ALWAYS vastly over estimates their own competence, fools rush in etc, and what usually happens is this.
In this example, matey has two choices, one, he can buy this fancy tool and hopefully pull and replace the injectors as is, or two he can not buy the tool and do a bit more dismantling.
What do you save by not dismantling, a cheap gasket and an "extra" 20 minutes labour.
What do you lose, you have to buy a tool, an easy job gets fiddly, and fiddly jobs are where your time goes and also where you hear "oops"
What is the point this wannabe mechanic pulling injectors and then getting them serviced, and then, because he AINT a diesel fitter, he will use literally less than surgically clean hands when reinstalling the injectors.
Dirt way too small for you to see or feel is more than enough to put him in a worse place than he is now, and do we see anyone telling people playing with diesel systems (or auto boxes or hydraulics) that the cardinal rule is that cleanliness IS godliness? Nope, lots of talk about pouring snake oil in the tank to service the injectors.
My position has been very clear, does the motor start easy from cold? If it does, there isn't a lot wrong with it, certainly not enough to encourage a wannabe mechanic to break (as in breach) the seals on the high pressure fuel system and allow dirt in.
If/when it ain't perfect after he does his injectors the FIRST question the diesel fitter is going to ask (on hearing the problem / story) is "who did the injectors?" and "me" is the most expensive answer you can give, because then the pro can't take anything for granted.
How many copper washers are under the "bad" injector? none? one scarred one? two? one and some dirt?
My mate used to work in a motorcycle garage, basically all jap bikes took 12 mm plugs, basically there were only three reaches, you wouldn't credit what proportion of people fitted the wrong plug, and this was WAAAY before there was an internet to help them.
"How can it possibly need a new engine! All I did was change the plugs! You are a bunch of thieves!" in response to the third patient attempt to explain why all 4 pistons were holed and all 4 rods bent and the head warped.
Hyanes, bless their little cotton socks, with their spanner rating system, put injectors at 3 out of 5 spanners, described as "fairly difficult, suitable for competent diy mechanic" which doesn't sound like the OP, BTW this rating is doing it the proper way, dismantling other bits first for access, no special tool crap.
Spill timing the pump, which you end up doing when some numpty with dirty hands makes a balls up of what should be a fairly easy job, and you have to strip and clean the entire high pressure system, haynes rate at 5 spanners, "very difficult, suitable for expert diy or professional"
KNOWING which procedure to do in response to a set of symptoms isn't in the book, if his engine starts from cold, doesn't "knock" on cold tickover ( more of a transit van sound for the OP) and doesn't shake then he ain't got injector problems.
Shoving literally unassayed liquids into the fuel tank, declaring that they are "fuel" and then simply eliminating that "fuel" from the radar is just plain ignorant.
Have you seen the guy's sig?
WVO 85%, 15% Diesel and Acetone 1%
Whatever it is, it doesn't qualify as A2 grade diesel fuel oil.
Fix the bloody car on pump diesel and establish a known good baseline BEFORE you start pissing around like some medieval alchemist trying to run your car on strained cabbage juice.
. The people who like you says this are usually bully, therefore You are no use here. Also mister WANNABE advisor, You are not giving any advice here, just slagging people with your little sarcasms. Childish, really. WANNABE advisor. TSS,TSS... 
