Regarding the Heller French 74-gun ship kits - I haven't seen either of them "in the flesh" for years. I do, however, remember (to the extent that my senile brain remembers anything these days) writing a review of Le Superbe for a British magazine, Scale Models, when the kit was initially released. My recollection is that I gave it a fairly good review; I remember thinking that Heller had come a long way, in terms of concern for accuracy, since the Soleil Royal of a few years earlier. As I remember, the negative points I found were as follows (starting with the less significant ones):
1. The cheeks of the gun carriages were parallel, rather than following the taper of the gun barrels. (Not a big deal except in the case of the guns on the weather decks, which could be fixed without a great deal of difficulty.)
2. The rigging diagrams were utterly irrational. Some of the worst Heller ever did - which is saying a good deal.
3. The spar components didn't have much detail.
4. The belaying pins, or some of them at any rate, had sharp points. (A belaying pin with a pointy end is pretty silly. Somebody in the Heller plant apparently thought belaying pins were pounded through the pinrails with brute force.)
5. The hull halves had "wood grain" detail, but no indication of the edges of the planks. The result was that the entire hull looked like it had been hacked out of a single, impossibly enormous tree.
6. Most seriously, the deck components, though the planking detail on them wasn't too bad, were perfectly flat. In that respect the kit duplicated one of the major errors of the Heller Soleil Royal. Deck camber - the slight but quite noticeable upward arc of a deck near at the ship's center line - has been a fundamental component of ship construction for hundreds of years. There's no doubt whatever that French warships of the seventeenth and eighteenth centuries - like virtually all large sailing vessels of every period - had deck camber. A flat deck on a model of such a ship just doesn't look right.
How important those problems are, I'll leave to the individual modeler. All of them except the lack of deck camber could be fixed fairly easily - though adding the planking detail to the hull halves would be a challenge. The deck components, of course, could be replaced with wood, and the camber added; the big difficulty would lie in adding the camber to the bulkheads, transom, etc.
Heller in those days was constantly improving its ship kits. These 74s certainly represented a big step forward from Le Soleil Royal, which in turn was light years ahead of such kits as that so-called "Oseberg Ship" the Royal Louis, La Syrene, and various other earlier ventures. At about the same time (the late seventies) the galley La Reale appeared; for my money it may be the best kit Heller ever produced. And shortly after the two French 74s came the 1/100 H.M.S. Victory. With that one, Heller apparently discovered (among many other things) the concept of deck camber. That kit not only has camber built into the deck and bulkhead parts, but includes a series of plastic "deck beams" to make sure the camber is right.
Not long after that, Heller got out of the sailing ship kit business. Our good Forum friend Michel vrtg has told us about some of the projects that were in the planning stage at that time - including a Sovereign of the Seas, Henri Grace a Dieu, and, if I remember correctly, H.M.S. Prince. If those kits had continued in the direction Heller was headed, they might well have been masterpieces.