Yes you definitely want 'bumper' shields to absorb casual landings. A Dolphin should be perfectly fine with 3D shields as it provides over 100mj. Hull reinforcements should not be necessary as they add weight (reduce jump range) and you should absolutely not be damaging your hull while exploring.
You can experiment with E rated G5 heavy duty shield boosters to pump up your shields further but I wouldn't expect a significant improvement on a Dolphin. Instead, I'd recommend simply landing on low gravity worlds to minimise any risk. There is absolutely no reason to do a dangerous high gravity landing when out in the black, unless you miraculously discover Raxxla or something...
Build your ship and then do a few practice landings on various planets while paying attention to the gravity, this will give you all the experience you need and let you stress test your ships defences. With 4 pips to sys most ships can shrug off even clumsy landings if they have shields.
Hell, the Dolphin even has room for a little 1d repair limpet if you're worried. That would provide potentially unlimited hull repairs and still be lighter than most hull reinforcement modules...
Thanks for that Maymo, I'll take another look at my setup and tweak it as you suggest. When you say that 100mj of shield is OK. Is there a calculation to work out adequate shielding for a ship and it's chosen application or is it just an acceptable amount generally?
Thanks for your time
