The instrument cluster (which is not "modular" in any way) is in 3 parts, LH, RH and middle. If it's not modular why is it in 3 parts?
What is an instrument "cluster"?
The instrument
panel (the usual aviation name) of a TB has three parts to it. The 2 end ones tilt forward and also there is rear access to each via exernal inspection panels. The middle part, which could be called a "cluster", is the fairly usual avionics construction which is used for pluggable avionics, comprising of an aluminium sheet fabricated box which has almost no access to the back of it and which has to come out whole to re-wire the instruments in it. Normally, one has radios, GPS and other
pluggable items in the middle part, and these come out with a 3/32 allen key (but you knew that, hey?). The only time one needs to access the middle part of the TB instrument panel is when doing really major avionics work. The individual instruments just pull out.
I am merely trying to dispel the saaaaaaame ooooold rumours which go around GA about the TB range, repeated mostly by people who have never actually done the work on these types.
The reality is that a TB is constructed pretty conventionally throughout and any maintenance person with a brain and who can read (the MM) can work on it. For really major work, say installing a TCAS system, there are loads of gotchas as to how to remove e.g. the interior trim without making a mess, but how often does the average punter spend 5 digits on an avionics upgrade? And one would hope that if doing such an upgrade he will take the plane to a firm which does serious work on upmarket types, not some monkey.
The individual avionics e.g. altimeters etc are in the end sections which have excellent access. You can pop in a new altimeter in the time it takes to sort out the static hose on the back of it.