I improved my chipping a lot by practicing off a door mat from B&Q. The result has been a lot of up and downs so far this season. Here's what I learned:
1. Weight on the leading leg.
2. Shallow swing path - let the loft of the club do it's thing
3. Swing path is straight back and straight...
I used to own an Explanar and it helped me enormously to get from a high to mid handicap. However, by its nature it doesn't promote much lateral body movement because your hands will hit the hoop. So I sold it and moved on. I agree that lessons are your best bet, and would suggest an orange whip...
Can only comment on the TM version which has a slightly offset looking head that annoys me. However its performance is very good and for most of the summer I used it instead of the full driver. Now it's cooling down it's back the garage but will be back next May!
Pretty normal I would say, and for me it could be anything from 8I to 6I depending on the wind etc. The conditions will dictate your accuracy so don't stress about it. The fact you play off 8 is the metric to focus on.
On our course you can hardly ever play a classic 'range' shot with your irons because the ball is always above or below your feet. In fact it's almost pointless practising irons. The only thing you can perfect on the range for us is driving and pitching. So the best way to bridge the gap between...
TM R11 series was very good and can be picked up for a nice price now. Likewise, the SLDR irons were excellent and a full set can be picked up new for only £300. A second-hand set might be half that. Bargains I tell you.
I have a relatively new TM one, which is perfect. It has a grab handle at the top which the older models don't have, which is a revelation and should have been put on them years ago! They are all much of a muchness now. Just make sure you buy one with the grab handle.