Solarian Weapon Crystals and "Only" Fusions

[Frog_The_Bandit]

So recently the living world server I am apart of has been struggling with the question of if Solarian Weapon Crystals can have fusions that can only be put on specific types of weapons (for example, how the Chained Fusion can only be put on melee weapons). Since a Weapon Crystal is not the weapon itself nor is it capable of being a melee weapon (following the previous example), is it capable of having a "melee only" fusion?

[Tim Emrick]

A weapon fusion placed on a solarian weapon crystal will affect the solar weapon produced by the receiving mote exactly as a fusion placed on any other kind of weapon would. So if it's a melee-only fusion, you can use that crystal with a solar weapon but not a solar flare. If it's bludgeoning-only, you can only use it on a solar weapon that deals that damage type, not one that deals S or P damage.

Note that fusion seals can be used with weapon crystals, too. The text for the soulfire fusion (the most popular crystal-only fusion) explicitly refers to fusion seals. And like any other fusion seal, you can't attach it to a weapon that isn't a legal choice for the fusion.

[Frog_The_Bandit]

Tim Emrick wrote:

A weapon fusion placed on a solarian weapon crystal will affect the solar weapon produced by the receiving mote exactly as a fusion placed on any other kind of weapon would.

The issue with this though is that Solarian Weapon Crystals don't receive any of the properties of the Solarian Weapon they're modifying. The relationship between the two is only ever described as the crystal influencing the weapon, never the other way around.

[BigNorseWolf]

The fusions are only technically placed on the crystal they function as if they're on the weapon.

Look at the soulfire weapon fusion. It doesn't have any special rules about being able to be put on a crystal.

The crystals are listed as weapons so they're valid targets.